---
product_id: 651585108
title: "SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits"
brand: "sjcam"
price: "¥27836"
currency: JPY
in_stock: true
reviews_count: 8
category: "Sjcam"
url: https://www.desertcart.jp/products/651585108-sj4000-dual-screen-4k-16mp-wifi-action-camera-ultra-hd
store_origin: JP
region: Japan
---

# 30M Waterproof Dive Ready WiFi Connectivity & App Control 16MP Ultra HD Shots SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits

**Brand:** sjcam
**Price:** ¥27836
**Availability:** ✅ In Stock

## Summary

> 🎥 Dive into action with clarity and style — your ultimate adventure companion!

## Quick Answers

- **What is this?** SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits by sjcam
- **How much does it cost?** ¥27836 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/651585108-sj4000-dual-screen-4k-16mp-wifi-action-camera-ultra-hd)

## Best For

- sjcam enthusiasts

## Why This Product

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

## Key Features

- • **Dual Screen Freedom:** Innovative front selfie and rear preview screens keep you in control and in the moment.
- • **Dive Deep, Shoot Deeper:** IP68 waterproof case lets you explore underwater worlds up to 30 meters without missing a frame.
- • **Seamless Social Sharing:** Built-in WiFi connects instantly to your phone for quick edits and viral uploads on TikTok, Instagram, and more.
- • **Capture Every Detail in 4K:** Professional 4K30fps video and 16MP photos for stunning clarity and vibrant memories.
- • **Power Through Your Adventures:** Includes 2x 900mAh batteries for extended shooting time—never miss a beat on your next thrill.

## Overview

The SJCAM SJ4000 is a compact, professional-grade 4K action camera featuring a 16MP sensor and a 170° wide-angle lens. It offers dual screens for versatile shooting angles, is waterproof up to 30 meters with an IP68 case, and supports WiFi connectivity for easy social media sharing. Equipped with two rechargeable 900mAh batteries and a 32GB SD card, it’s designed for extended use across diverse sports and underwater activities.

## Description

Action camera 4k 30fps 98ft waterproof underwater cameras perfect for skiing snowboating skating snorkeling scuba diving sports gopro camera hero go pro 12 11 10 9 8 7 action cam for motorcycle rearview camera front rear screen dual ek7000 brave 4

Review: Very good just good looking also 👍 - Sjcam dual screen is very good connectivity is also good value for money color is very good quality a1 functions too good
Review: Not completely reliable - Stopped working after 4th dive.

## Features

- 【Upgrade Series of SJCAM SJ4000】Features professional 4K30fps, 2.7K30fps, 1080P 60fps/30fps and 720P120fps Video Resolution. With 16MP Images and a 170°super wide-angle lens, the SJ4000 action camera enables you to capture the exciting moments in your life in more detail.
- 【98ft/30m Waterproof Camera】Equipped with durable IP68 waterproof case which can protect the SJ4000 underwater camera from diving to depths of up to 30 meters. With the waterproof camera, you can record the beautiful underwater scenery to your heart's content. Perfect for water sports like swimming, surfing, diving, snorkeling, motorboating, rafting, etc.
- 【Convenient Dual Screen Action Cam】SJ4000 action camera adopts an innovative dual color screen design, which can freely switch between front and rear screens. The vivid front screen can meet your selfie needs, and the back is a 2-inch HD display screen that allows you to preview wonderful videos and photos in motion anytime, anywhere.
- 【Wireless Wifi Action Camera】Please follow the instruction manual to install the app "SJCAM Zone" on your phone or tablet, and connect with the SJCAM action camera through WiFi. You can capture the world in an all-new way, edit videos in a faster way and upload them to your social networking sites, such as TikTok, YouTube, Twitter, and Instagram, to keep up with the world. Notice: WiFi range up to 33ft.
- 【Multiple Modes for Use】 SJCAM 4K action camera features loop recording, driving mode, burst shooting, time-lapse video, self timer photo, exposure adjustment, white balance adjustment, image flipping, etc. 2-inch LCD Screen operation interface, larger font and clearer image. The underwater camcorder will exceed your expectations.
- 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧 & 𝐂𝐡𝐚𝐫𝐠𝐢𝐧𝐠 𝐭𝐢𝐦𝐞 : 900mAh battery Charging Time 3 hours & Up to 1.3 Hours per Charge Battery life

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BY2TFKKZ |
| Antenna Location | Water sports, scuba diving, snorkeling, snorkeling, surfing, skiing, motorboating, rafting, and motorcycle bike camera etc. |
| Are Batteries Included? | Yes |
| Battery Average Life Unit of Measure | 1.3 Hours |
| Best Sellers Rank | #74,131 in Electronics ( See Top 100 in Electronics ) #59 in Action Cameras |
| Box Contents | 1* Action Camera, 1* Waterproof Case, 2 Rechargeable Batteries, 1* Charger, 1* 32GB micro SD Card, 1* Helmet Mounting Kits,1* Charging Cable, 1* Use Manual |
| Brand | SJCAM |
| Brand Name | SJCAM |
| Camcorder Type | Action Camera |
| Colour | Black, Sj4000 Dual Screen Combo |
| Compatible Devices | Smartphone, Tablet |
| Country of Origin | China |
| Customer Reviews | 4.0 out of 5 stars 204 Reviews |
| Digital Zoom | 1 x |
| Effective Still Resolution | 16 MP |
| Effective Video Resolution | 3840 Pixels |
| Exposure Control Type | Automatic, Manual |
| File Format | MP4 |
| Flash Memory Speed Class | C10 |
| Flash Memory Type | Micro SD |
| Flash Memory UHS Speed Class | 1 |
| Flash Memory Video Speed Class | V60 |
| Focus Type | Auto Focus |
| Form Factor | Compact |
| Has Image Stabilization | Yes |
| Image Aspect Ratio | 16:9 |
| Image Capture Speed | 60 fps |
| Image Stabilization Type | Stabilization |
| Importer Contact Information | BIG TRENDS D-50, Hari Alokik Heights,G-3 Ground Floor, Subhash Marg,C-Scheme, Jaipur-302001, India |
| Item Dimensions D x W x H | 3D x 6.5W x 5H Centimeters |
| Item Type Name | Action Camera |
| Item Weight Unit of Measure | 400 Grams |
| Lens Type | Wide Angle |
| Manufacturer | SJCAM, SJCAM LimitedCo.,Ltd. Shenzhen Hongfeng Century Technology Co. Ltd.3/F, Building C, NO.2 ,Road 1, Shangxue Industrial Area,Bantian Street, Longgang District, Shenzhen, China |
| Manufacturer Contact Information | SJCAM LimitedCo.,Ltd. Shenzhen Hongfeng Century Technology Co. Ltd.3/F, Building C, NO.2 ,Road 1, Shangxue Industrial Area,Bantian Street, Longgang District, Shenzhen, China |
| Maximum Aperture | 2 f |
| Maximum Display Resolution | 4K UHD |
| Maximum Focal Length | 35 Millimeters |
| Minimum Focal Length | 7 Millimeters |
| Model Name | SJ4000 |
| Model Number | SJ4K PRO |
| Network Connectivity Technology | Wi-Fi |
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
| Number of Speakers | 1 |
| Optical Zoom | 1 x |
| Packer Contact Information | SJCAM LimitedCo.,Ltd. Shenzhen Hongfeng Century Technology Co. Ltd.3/F, Building C, NO.2 ,Road 1, Shangxue Industrial Area,Bantian Street, Longgang District, Shenzhen, China |
| Photo Sensor Technology | CMOS |
| Product Features | Audio Record, Dual Screen, Playback, Time Lapse, WiFi Action Camera |
| Screen Size Unit of Measure | 2 Inches |
| Sensor Type | CMOS |
| Shooting Modes | Automatic, Continuous Shooting, Interval Shooting, Time Lapse, Loop Recording, Driving Mode, Selfie Timer |
| Style Name | SJ4000 DS |
| Supported Audio Format | AAC, MP3 |
| Supported Image Format | JPEG |
| Unit Count | 1 Count |
| Video Capture Format | MP4 |
| Video Capture Resolution | 4K |
| Viewing Angle | 170 Degrees |
| Warranty Description | 1 Year |
| Water Resistance Level | Waterproof |
| White Balance Settings | Auto |
| Wireless Compability | 802.11ac |
| Zoom | Digital |

## Product Details

- **Brand:** SJCAM
- **Connectivity Technology:** Wi-Fi
- **Flash Memory Type:** Micro SD
- **Maximum Aperture:** 2 f
- **Maximum Focal Length:** 35 Millimeters
- **Photo Sensor Technology:** CMOS
- **Screen Size:** 2 Inches
- **Supported Audio Format:** AAC, MP3
- **Video Capture Format:** MP4
- **Video Capture Resolution:** 4K

## Images

![SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits - Image 1](https://m.media-amazon.com/images/I/81oTtNYt1vL.jpg)
![SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits - Image 2](https://m.media-amazon.com/images/I/71ExT+f55nL.jpg)
![SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits - Image 3](https://m.media-amazon.com/images/I/71aXaMm7c3L.jpg)
![SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits - Image 4](https://m.media-amazon.com/images/I/71XdrDFLO0L.jpg)
![SJ4000 Dual Screen 4K 16MP WiFi Action Camera Ultra HD 30M Underwater Camera 170° Wide-Angle Waterproof Sports Cam with 2X 900 mAh Batteries, Charger, 32GB SD Card and Accessories Kits - Image 5](https://m.media-amazon.com/images/I/71KnVLcm5VL.jpg)

## Questions & Answers

**Q: Functions of the camera's OK button**
A: OK button: Power On/Off, Confirm Selection, or Start/Stop Recording. --- Long press to power on/off. Short press to confirm options or start/stop recording.

**Q: Functions of the camera's Up/Down buttons**
A: Up button: Long press for 3 seconds to Switch Modes. DON'T release, as it will be detected as short press, resulting in move up or enabling WiFi function. Down button: Long press for 3 seconds to Switch front and rear screen. Short press-move down.

**Q: How do I switch shooting modes or set the camera?**
A: To change the shooting mode or settings, press and hold the WiFi(Up) button for 2-3 seconds for easy switching. It takes a little more patience than the touchscreen. But after using the action camera for a while, you will get used to its operation.

**Q: The camera doesn't stay connected to the phone APP. How can I fix this problem?**
A: I recommend that you turn off cellular data on your phone and then connect to the camera via WiFi. This will ensure that the WiFi connection is not affected by the phone's network and will improve the stability of the WiFi connection.

**Q: The SJ4000 action camera is inserted a micro SD card(TF card), but it still prompting "Please insert SD card".**
A: For the first time use, you need to format the micro SD card by using the format function in the camera. First, please check if your micro SD card has been formatted. If the problem remains, you can check if the Micro SD card is correctly inserted.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good just good looking also 👍
*by V***A on 23 December 2025*

Sjcam dual screen is very good connectivity is also good value for money color is very good quality a1 functions too good

### ⭐⭐⭐ Not completely reliable
*by A***A on 27 June 2025*

Stopped working after 4th dive.

### ⭐ Total waste of money don't purchase this item
*by Y***N on 25 April 2025*

Total waste of money hair nahi kharida to achcha hai kyunki iske camera mein Lance ke samne scratch hai aur iska camera zoom nahin karta uske साथ-साथ iska Lance bhi kharab hai battery sirf ek Diya Hai jismein teen battery Dena chahie memory card 2024 ka hai aur usmein bahut sare photos aur videos hai Saman bhi ismein mising hai agar return karoge to Jo Saman nahin rahega tumhare pass aur jo product mein dikhaya gaya hai ki tumhen pura Saman Diya Gaya Hai tumhara uska Paisa bhi Kat lenge aur use camere kamai ke bhi acche se nahin sahi hai Main to yahi suggestion karunga na kharide nahin to Paisa barbad ho jaega is jagah kam ka yah camera ekadam bekar hai maine cancel kiya to 15 din tak de raha hai receive hone ke liye aur 15 din bad payment aaega to payment utna hi aaega jitna Tum item de rahe ho uska hisab kitab lagakar memory card ekadam bekar hai aur is camere ko clean karne ke liye ek Chhota Sa kapda Diya Hai vah bhi Aisa Diya Hai jaise ki munh hath pahunchkar andar Dala Gaya dont bye dis item total off West off Mani

## Frequently Bought Together

- SJCAM 4K Waterproof Camera Underwater Camera Snorkeling Action Camera Dual Screen Ultra HD 170° Wide-Angle Motorcycle Helmet with Stabilization, 2 Batteries and Accessories,Gifts
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- Amazon Basics Micro SDXC Memory Card with Full Size Adapter, A2, U3, Read Speed up to 100 MB/s, 128 GB, Black

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-16*