---
product_id: 449949612
title: "EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor"
brand: "earfun"
price: "¥24509"
currency: JPY
in_stock: true
reviews_count: 13
category: "Ear Fun"
url: https://www.desertcart.jp/products/449949612-earfun-bluetooth-speaker-uboom-l-portable-speaker-28w-loud-stereo
store_origin: JP
region: Japan
---

# IP67 waterproof & dustproof 28W powerful stereo output 16 hours battery life EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor

**Brand:** earfun
**Price:** ¥24509
**Availability:** ✅ In Stock

## Summary

> 🎉 Unleash the party beast—wherever life takes you!

## Quick Answers

- **What is this?** EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor by earfun
- **How much does it cost?** ¥24509 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/449949612-earfun-bluetooth-speaker-uboom-l-portable-speaker-28w-loud-stereo)

## Best For

- earfun enthusiasts

## Why This Product

- Trusted earfun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless Dual Pairing:** Double the volume, double the fun—wirelessly connect two UBOOM L speakers for an epic stereo experience.
- • **Extended 16-Hour Playtime:** Keep the vibe alive from sunrise to sunset with a long-lasting rechargeable battery and fast USB-C charging.
- • **Immersive 28W Stereo Sound:** Feel every beat with dual 55mm drivers and passive radiators delivering booming bass and crystal-clear clarity.
- • **All-Weather Ready with IP67:** Take your party anywhere—rain, pool, or dust won’t stop this rugged, floating speaker.
- • **Smart Indoor & Outdoor Modes:** Tailor your soundscape with optimized modes for rich bass indoors or louder, clearer sound outdoors with ultra-low latency video sync.

## Overview

The EarFun UBOOM L is a compact yet powerful 28W Bluetooth speaker featuring dual 55mm drivers and passive radiators for rich stereo sound and deep bass. Engineered with IP67 waterproof and dustproof certification, it’s built to withstand all environments, including poolside and outdoor adventures. With up to 16 hours of battery life and fast USB-C charging, it keeps your music going all day. Dual pairing technology lets you wirelessly connect two speakers for an immersive soundstage, while indoor and outdoor modes optimize audio performance. A built-in mic supports hands-free calls and voice assistant access, making it a versatile companion for work, play, and everything in between.

## Description

Product Description [2022 VGP Award] EarFun UBOOM L Bluetooth Speaker aplus content video Premium Natural Sound - an Honest and Natural Sound You’ll Want to Share EarFun's proprietary JumboBass Technology Powerful 28W Stereo Sound Bluetooth Connectivity It produces clear and balanced audio faithful to the music you love, and at every volume level, you will enjoy huge stereo sound with intense bass. Two full-range drivers and dual passive radiators produce deep accurate bass, allowing the sound to be transmitted more clearly in your space. Utilizes Bluetooth for ultra-stable connection and skip-free music streaming. Up to 30m(100ft) working range, no worries for signal dropping. Dynamic Bass Boost Drivers and Dual Passive Radiators - offering you a premium sound quality and powerful sensory experience. IP67 Waterproof & Dustproof Do not worry about dust and rain, it will float back up to the surface if it's dropped in water. Stereo Pairing for Double Fun Connect two UBOOM L speakers to add more juice to your dance party. 16 Hours Battery Life Type-C fast charging makes charging up to 40% faster. Packing up to 16 hours of killer sound. 150ms Video Mode The video mode makes the audio lag reduce down to about 150ms(250ms for regular Bluetooth speakers). Handsfree Calling Use the speaker for taking call without touching your phone, also good for conference meeting on PC. Indoor Mode with emphasis on bass Indoor modes deliver full bass and balanced sound. Perfect when you want to immerse yourself at home and enjoy every detail in your favorite music. Outdoor Mode for loud sound Outdoor Mode provides clear sound through a wide space. Suitable for outdoor leisure or field activities such as cycling, outing, beach, etc. Built-in microphone You can make and receive phone calls through the EarFun UBOOM L Bluetooth speaker, and just one button accesses your phone's Siri or Google Assistant voice input if your phone is out of reach. Built-in microphone You can make and receive phone calls through the EarFun UBOOM L Bluetooth speaker, and just one button accesses your phone's Siri or Google Assistant voice input if your phone is out of reach. Portable Build Easily to take it on adventures, wherever the party is. Portable Build Easily to take it on adventures, wherever the party is. USB-C Charging You just need 4 hours charging time with efficient USB-C cable in the package. USB-C Charging You just need 4 hours charging time with efficient USB-C cable in the package. 3.5mm Aux Input Allows you connect other resource for more compatibility. 3.5mm Aux Input Allows you connect other resource for more compatibility. 2 Passive Radiators The enhanced 2 high-sensitivity drivers deliver breathtaking stereo sound with exceptional clarity and zero distortion. 2 Passive Radiators The enhanced 2 high-sensitivity drivers deliver breathtaking stereo sound with exceptional clarity and zero distortion. Lithium-ion battery EarFun UBOOM L Bluetooth speaker features a high-capacity rechargeable 2600 mAh battery for 16 hours of play time. Lithium-ion battery EarFun UBOOM L Bluetooth speaker features a high-capacity rechargeable 2600 mAh battery for 16 hours of play time.

Review: Perfect for holidays and camping. - Having owned this for over a year now I thought it time to write a review. My original intention was to buy a mini rig to take on holiday and for using on our small boat as they work great outdoors. I was put off though by their lack of waterproofing and high cost. After doing some research I came across the earfun boom. I was a bit sceptical but intrigued at the random guy claiming he tuned it to almost perfection however other reviews showed it to be truly waterproof and good value for money. I used the discount code on one of the videos and bought it. The build quality looked great and from the very outset I was impressed by the sound. Taking it abroad I mainly used it by the side of the pool, on the balcony in the evenings, and for some background music in the room during the day. In all places I found the sound to be of great quality. I listen to a lot of music, sometimes through quite expensive speaker systems and I have to say this punches well above its weight. There's never been an occasion where it wasn't loud enough. As for the quality of sound I tend to listen to Rock and Metal. The sound is excellent and makes for a great listening experience. The battery life has always been more than enough. It's very durable as it's been bounced around work vans, and gone from one overnight bag to another. It's definitely waterproof as its been out in the rain and been thrown in bags with wet beach towels. I tend not to go on trips without it now. Some of the lads at work have big JBL units which although are louder definitely lack the quality of this. Even in a workshop environment it works well. The connectivity is seamless and its simple to set up. Without a doubt there's louder and better quality speakers out there but there always seems to be a down side. Either they're not waterproof, poor battery life or just stupidly expensive. For the money though this is a great all rounder and I love the sound quality and robustness. My only criticism....and it's certainly not a deal breaker, would be that when I throw it an a rucksack it's easily switched on by accident as the buttons sit proud. A recessed power button would be a great improvement. Another suggestion would be that they make a hard case available as I'd definitely spend the extra money to keep it better protected when it's not in use. Other than that I've been very happy with it. I'm very tempted to buy a second one for stereo sound as I think it would make for an even better listening experience when outdoors. I really don't feel the need to buy any more other Bluetooth speakers now. Yes, I'd highly recommend this!👌 Update. I bought a second one so that I would have a stereo pair. I used it recently outside at a family party. The sound quality was excellent, more than loud enough for a large garden and was fine when it started to rain. The battery's outlasted us......from around 5pm to about 4 in the morning and still had enough juice for some background music the next day before we went home. Awesome product. I'd still like to see an option for a soft shell type case for travelling.
Review: A surprisingly good speaker at a great price - I did a fair amount of research before plumping for the Earfun L for £56. At Peter Jones & at Currys I listened to various devices, including the Flip 6 (£74) and JVC XSD5212A (£69). The Flip 6 should have won hands down as its 190 grams lighter, has 2W more power. Yet to my untrained ear it sounded too bright. One device that did sound better on Austrian tuner Olaf Lubanski's youtube samples is the Bose Soundlike Flex (£149), which has a fuller, pleasant bass sound. The Earfun L seemed to me to offer the best value. desertcart prime delivered within 24 hours, and I was excited to fire it up. It sounds pretty darn good! At first I tuned to the outdoor setting, but by morning I was preferring the indoor tuning. The device was delivered with the 0.50 tuning rather than Olaf Lubanski's 0.45 tuning I am happy with the sound at the supplied setting, but I will use software to revert to Olaf's critically acclaimed 0.45 setting. Bravo Earfun L for marketing a decent-sounding speaker at a fair price! I would be highly skeptical of the 16 hour battery life, which the manual describes as dependent upon both volume level and audio content. A new speaker battery may indeed last for 16 hours if playing jazz or classical music at low volume. At higher volumes the battery life is likely to be considerably less, and the more times you recharge, the less efficient the battery becomes. I guess we all know this from experience with our mobile phones. If you can pick one of these beauties up for £56 I don't think you'll go far wrong.

## Features

- 🎤[Remarkable DSP Algorithms, A Sound You’ll Want to Share] The advanced Digital Signal Processing (DSP) keeps the noise at bay for a clean sound while still preserving the sonic details of your favorite tracks. With EarFun’s proprietary JumboBass Technology, a magic music world in huge stereo sound is opened for you.
- 🎤[Two 55mm Drivers and Passive Radiators, To Feel The Booming Bass] The enhanced 2 high-sensitivity drivers deliver breathtaking stereo sound with exceptional clarity and zero distortion. The dual external passive radiators will demonstrate how powerful this Bluetooth speaker is. You can hear the bass, feel the bass and see the bass.
- 🎤[Indoor & Outdoor Mode, Bring the Party Anywhere] Indoor modes deliver full bass and balanced sound, whereas outdoor modes deliver louder sound and longer battery life. You can also turn the video mode on with super low latency for better video experience while indoors. EarFun Bluetooth speaker size is small, but you can enjoy the powerful sound through the large output of 28W outdoors.
- 🎤[IP67 Dustproof & Waterproof, Ideal Bathroom Speaker] The wireless speaker is IP67 Fully Waterproof with EarFun’s Innovative Sweatshield Technology, and it’s crafted and sealed with waterproof materials so there is no problem washing, and it floats too. If you drop it in the pool, it will pop to the surface in seconds.
- 🎤[Wireless Stereo Pairing, To Get More Powerful Sound] Using the latest True Wireless Stereo Technology, you can Pair two UBOOM L via a single device for double the volume or huge stereo sound. The party mode make it possible if you want to share the your music with others next door.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B1PJ5SQ7 |
| Age Range Description | Adult |
| Antenna Location | For music players |
| Audio Driver Size | 55 Millimetres |
| Audio Driver Type | Dynamic Driver |
| Audio Encoding | Stereo |
| Audio Latency | 50 Milliseconds |
| Audio Output Mode | Stereo |
| Audio output mode | Stereo |
| Battery Average Life | 16 Hours |
| Battery Capacity | 5200 Milliamp Hours |
| Battery Charge Time | 4 Hours |
| Best Sellers Rank | 322 in Portable Bluetooth Speakers |
| Bluetooth Range | 10 Metres |
| Box Contents | Bluetooth Speaker, User manual |
| Brand | EarFun |
| Brand Name | EarFun |
| Colour | Black |
| Compatible Devices | Gaming Console, Laptop, Smartphone, Tablet, Television |
| Connectivity Protocol | Bluetooth |
| Connectivity technology | Bluetooth |
| Control Method | Touch |
| Controller Type | Voice Control |
| Country of Origin | China |
| Customer Package Type | FFP |
| Customer Reviews | 4.5 out of 5 stars 1,061 Reviews |
| Enclosure Material | Synthetic material (possibly silicone or hard plastic) |
| Frequency Response | 22 KHz |
| Frequency response | 22 KHz |
| Input Voltage | 7.2 Volts |
| Input voltage | 7.2 Volts |
| Is Electric | Yes |
| Is Waterproof | True |
| Item Dimensions D x W x H | 7.8D x 21W x 7.2H centimetres |
| Item Type Name | EarFun Uboom L - 28W Bluetooth Speaker |
| Item Weight | 650 Grams |
| MP3 player | No |
| Manufacturer | EarFun |
| Maximum Range | 15 Metres |
| Maximum Speaker Output Power (in watts) | 28 Watts |
| Model Name | UBOOM L |
| Model Number | SP300 |
| Mounting Type | Tabletop |
| Network Connectivity Technology | Bluetooth |
| Number Of Circuits | 1 |
| Number of Audio Channels | 2.0 |
| Number of Batteries | 1 Lithium Ion batteries required. |
| Number of Items | 1 |
| Number of Power Levels | 1 |
| Power Source | Battery Powered |
| Product Features | IP67 Dustproof & Waterproof, Ideal Bathroom Speaker, Indoor & Outdoor Mode, Bring the Party Anywhere, Remarkable DSP Algorithms, A Sound You’ll Want to Share, Two 55mm Drivers and Passive Radiators, To Feel The Booming Bass, Wireless Stereo Pairing, To Get More Powerful Sound |
| Product Warranty | 18 Months Warranty |
| Series Number | 300 |
| Speaker Size | 55 Millimetres |
| Speaker Type | Portable Bluetooth Speaker, Outdoor Speaker |
| Speaker maximum output power | 28 Watts |
| Specific Uses For Product | Business, Home Theatre, Party |
| Subwoofer Connectivity Technology | Wireless |
| Subwoofer Speaker Diameter | 55 Millimetres |
| Tweeter Diameter | 55 Millimetres |
| Unit Count | 650.0 gram |
| Warranty Type | Limited |
| Water Resistance Level | Waterproof |
| Wireless Technology Type | Bluetooth |
| Woofer Driver Diameter | 55 Millimetres |

## Product Details

- **Audio output mode:** Stereo
- **Brand:** EarFun
- **Connectivity technology:** Bluetooth
- **Frequency response:** 22 KHz
- **Input voltage:** 7.2 Volts
- **Material:** Composite
- **Model name:** UBOOM L
- **Mounting type:** Tabletop
- **Speaker maximum output power:** 28 Watts
- **Speaker type:** Woofer

## Images

![EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor - Image 1](https://m.media-amazon.com/images/I/710olipTCvL.jpg)
![EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor - Image 2](https://m.media-amazon.com/images/I/81JWfeRKPBL.jpg)
![EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor - Image 3](https://m.media-amazon.com/images/I/71A6Cxaf2fL.jpg)
![EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor - Image 4](https://m.media-amazon.com/images/I/71u8PHTvv0L.jpg)
![EarFun Bluetooth Speaker, UBOOM L Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speaker for Party, Indoor & Outdoor - Image 5](https://m.media-amazon.com/images/I/81+p+ndPSUL.jpg)

## Questions & Answers

**Q: How do you update firmware?**
A: If you do a Web or youtube search you will find links to download the required software, firmware update and instructions. It only takes seconds once the software is installed. Make sure you use a data usb-c cable as the one supplied with the speaker is for charging only.

**Q: Does this speaker work with my iPhone 13 Plus?**
A: Thank you for choosing EarFun. 
Yes, it can connect the iPhone 13 Plus.
About the way to connect, please see the video attached.
EarFun provides 30-day money back and 18-month warranty for every product. If there are any other concerns about product quality, please feel free to contact us again.
Sincerely,
EarFun Customer Service Team

**Q: If the speakers battery has run out, will it work when usb cable is plugged In OR do you need to wait until it is changed?**
A: My runs out ocassionly when I start charging after a few seconds it will start playing using a USB atachment.

**Q: How to reset the speaker?**
A: Thank you for choosing EarFun. 
About the way to reset the speaker, please see the video attached.
EarFun provides 30-day money back and 18-month warranty for every product. If there are any other concerns about product quality, please feel free to contact us again.
Sincerely,
EarFun Customer Service Team

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect for holidays and camping.
*by E***E on 20 May 2023*

Having owned this for over a year now I thought it time to write a review. My original intention was to buy a mini rig to take on holiday and for using on our small boat as they work great outdoors. I was put off though by their lack of waterproofing and high cost. After doing some research I came across the earfun boom. I was a bit sceptical but intrigued at the random guy claiming he tuned it to almost perfection however other reviews showed it to be truly waterproof and good value for money. I used the discount code on one of the videos and bought it. The build quality looked great and from the very outset I was impressed by the sound. Taking it abroad I mainly used it by the side of the pool, on the balcony in the evenings, and for some background music in the room during the day. In all places I found the sound to be of great quality. I listen to a lot of music, sometimes through quite expensive speaker systems and I have to say this punches well above its weight. There's never been an occasion where it wasn't loud enough. As for the quality of sound I tend to listen to Rock and Metal. The sound is excellent and makes for a great listening experience. The battery life has always been more than enough. It's very durable as it's been bounced around work vans, and gone from one overnight bag to another. It's definitely waterproof as its been out in the rain and been thrown in bags with wet beach towels. I tend not to go on trips without it now. Some of the lads at work have big JBL units which although are louder definitely lack the quality of this. Even in a workshop environment it works well. The connectivity is seamless and its simple to set up. Without a doubt there's louder and better quality speakers out there but there always seems to be a down side. Either they're not waterproof, poor battery life or just stupidly expensive. For the money though this is a great all rounder and I love the sound quality and robustness. My only criticism....and it's certainly not a deal breaker, would be that when I throw it an a rucksack it's easily switched on by accident as the buttons sit proud. A recessed power button would be a great improvement. Another suggestion would be that they make a hard case available as I'd definitely spend the extra money to keep it better protected when it's not in use. Other than that I've been very happy with it. I'm very tempted to buy a second one for stereo sound as I think it would make for an even better listening experience when outdoors. I really don't feel the need to buy any more other Bluetooth speakers now. Yes, I'd highly recommend this!👌 Update. I bought a second one so that I would have a stereo pair. I used it recently outside at a family party. The sound quality was excellent, more than loud enough for a large garden and was fine when it started to rain. The battery's outlasted us......from around 5pm to about 4 in the morning and still had enough juice for some background music the next day before we went home. Awesome product. I'd still like to see an option for a soft shell type case for travelling.

### ⭐⭐⭐⭐⭐ A surprisingly good speaker at a great price
*by M***B on 8 August 2023*

I did a fair amount of research before plumping for the Earfun L for £56. At Peter Jones & at Currys I listened to various devices, including the Flip 6 (£74) and JVC XSD5212A (£69). The Flip 6 should have won hands down as its 190 grams lighter, has 2W more power. Yet to my untrained ear it sounded too bright. One device that did sound better on Austrian tuner Olaf Lubanski's youtube samples is the Bose Soundlike Flex (£149), which has a fuller, pleasant bass sound. The Earfun L seemed to me to offer the best value. Amazon prime delivered within 24 hours, and I was excited to fire it up. It sounds pretty darn good! At first I tuned to the outdoor setting, but by morning I was preferring the indoor tuning. The device was delivered with the 0.50 tuning rather than Olaf Lubanski's 0.45 tuning I am happy with the sound at the supplied setting, but I will use software to revert to Olaf's critically acclaimed 0.45 setting. Bravo Earfun L for marketing a decent-sounding speaker at a fair price! I would be highly skeptical of the 16 hour battery life, which the manual describes as dependent upon both volume level and audio content. A new speaker battery may indeed last for 16 hours if playing jazz or classical music at low volume. At higher volumes the battery life is likely to be considerably less, and the more times you recharge, the less efficient the battery becomes. I guess we all know this from experience with our mobile phones. If you can pick one of these beauties up for £56 I don't think you'll go far wrong.

### ⭐⭐⭐⭐⭐ Brilliant sound for its size—perfect camper van companion!
*by R***O on 18 May 2026*

Having bought EarFun wireless earbuds in the past, I already knew the brand delivered excellent quality, so I decided to invest in this UBOOM L portable speaker for my camper van. I needed something to boost the sound quality of my portable TV and to play music when relaxing, and it certainly does not disappoint. ​The sound quality is surprisingly rich and powerful for such a compact speaker. It has never let me down, and when it’s not in use, it's small enough to easily tuck away out of sight. I am incredibly happy with this purchase—it's an absolute bargain for the performance you get.

## Frequently Bought Together

- EarFun UBOOM L Bluetooth Speaker, Portable Speaker 28W Loud Stereo Sound, Rich Bass, IP67 Waterproof & Dustproof, Dual Pairing, Built-in Mic, Low Latency, Wireless Speakers for Party, Indoor & Outdoor
- EarFun UBOOM X Portable Bluetooth Speaker, 80W Stereo with JumboBass, IP67 Waterproof Outdoor Speaker, RGB Light, 30H Playtime, Custom EQ, PowerBank, Bluetooth 5.3 Speakers for Outdoor, Camping, Beach

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---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-10*