Is the light and the time suppose to stay on constantly?

Hello Cade, There are 2 links below which should help to answer your question. The 1st will guide you to a user manual. The 2nd is a link to Boss Support https://bossaudio.com/product/mgr300b/ https://support.bossaudio.com/hc/en-us

Can i just hook it up to my amp, instead of using the head unit outputs?

Hello Tanner, Yes, you can use the pre-amp outputs to connect to your amplifier. Please see the link below for more information. https://bossaudio.com/product/mgr300b/

Besides the volume knob, what’s the difference between this and the boss 350b? There are no reviews anywhere

Hi Dedmon9 The 350b has an RDS Tuner, where the 300b doesn't. ("RDS" stands for "Radio Data System" and it allows FM broadcasters to send far more than just an analog audio signal out over the air waves. Using a 57 kHz "subcarrier," stations can transmit digital RDS data for reception by RDS-equipped FM tuners).

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BOSS Audio Systems MGR300B Marine Boat Stereo Gauge Receiver - Bluetooth, No CD DVD Player, AM/FM Radio, IPX5 Weatherproof, USB, MP3

BOSS Audio Systems MGR300B Marine Boat Stereo Gauge Receiver - Bluetooth, No CD DVD Player, AM/FM Radio, IPX5 Weatherproof, USB, MP3

Product ID: 646970087

Details

Brand
BOSS Audio
Compatible devices
Smartphone PC
Connectivity technology
Auxiliary USB
Controller type
iOS
Special features
USB upgrade

📱Bluetooth wireless streaming

🔊240W peak power output

🌧️IPX5 water & dust resistant

¥46980

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Description

🎶 Command the waves with sound that’s as unstoppable as you are!

POWERFUL 4 CHANNEL SOUND - Delivers 60 watts per channel for immersive, crystal-clear audio that transforms your marine experience.
BUILT TO BRAVE THE ELEMENTS - IPX5-rated weatherproof design with conformal coated PC board ensures your music stays alive through splashes and dust.
SEAMLESS BLUETOOTH STREAMING - Wirelessly connect your smartphone or MP3 player to access Spotify, Pandora, and more without missing a beat.
VERSATILE CONNECTIVITY OPTIONS - USB port for charging and music, plus auxiliary input and RCA pre-amp outputs for ultimate audio flexibility.
NIGHT READY ILLUMINATED CONTROLS - Backlit panel lets you effortlessly navigate your tunes even after the sun sets—perfect for late-night boat parties.

The BOSS Audio Systems MGR300B is a compact, IPX5 weatherproof marine stereo receiver delivering 240 watts of powerful Bluetooth-enabled audio. Designed for the professional millennial who demands seamless wireless streaming, rugged durability, and versatile connectivity, it features illuminated controls for night use, USB charging, and AM/FM radio. Backed by a 3-year platinum warranty, it’s the ultimate sound companion for your boat adventures.

Specifications

ASIN	B09TRZZJSH
Audio Encoding	Windows Media Audio (WMA)
Audio Output Mode	Stereo
Audio Output Type	Bluetooth
Best Sellers Rank	#45,127 in Electronics ( See Top 100 in Electronics ) #36 in Marine Electronics
Brand	BOSS Audio Systems
Built-In Media	Mounting kit, rubber cover, instruction manual
Color	Black
Compatible Devices	Smartphone, Tablet, PC, TV, Game console
Compatible devices	Smartphone, Tablet, PC, TV, Game console
Connectivity Technology	Auxiliary, Bluetooth, USB
Connectivity technology	Auxiliary , Bluetooth, USB
Connector Type	USB, 3.5 mm jack, CD
Control Method	Remote
Controller Type	iOS
Controller type	iOS
Customer Reviews	4.5 out of 5 stars 175 Reviews
Format	CD
Item Dimensions D x W x H	9.5D x 11.5W x 11.5H centimeters
Item Type Name	BOSS Audio Systems MGR300B Marine Boat Stereo Sound System Head Unit - No CD Player, Bluetooth Audio, IPX5 Rated, USB, MP3, AM/FM Radio Receiver
Item Weight	1.34 Pounds
Manufacturer	BOSS Audio Systems
Mfr Part Number	MGR300B
Model Number	MGR300B
Number of Items	1
Number of Packs	1
Other Special Features of the Product	USB upgrade
Output Power	60 Watts
Output Wattage	240 Watts
Special features	USB upgrade
Supported Internet Services	Spotify, Pandora
Surround Sound Channel Configuration	4.0
Total HDMI ports	4
Total Number of HDMI Ports	4
UPC	791489132534
Wattage	240 watts
Wireless Technology	Bluetooth

Reviews

L**S

Excelente

Muy buen producto; cumple con lo que promete.

28.11.2024

I**Z

Plug and play

Plug and play work perfect

22.07.2026

A**E

Cumple sus funciones y llega rápido 🫡

Es práctico para instalar y no necesitamos gran cosa, cumple sus funciones al cien 😃

13.06.2024

J**S

Good craftsmanship!!

Sounds great and easy to install! Has been on the boat for 3 years now and still working great!

26.12.2025

F**S

Decepción

No funciona el radio, trae un corto de fábrica. Y se calienta. Necesito devolverlo para que me lo cambien y no veo opción aquí

15.06.2024

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¥46980

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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