# Boss Audio MGR300B Marine Stereo w/AM/FM/BT/USB [MGR300B]

**MGR300B Marine Stereo with AM/FM/BT/USB**

The MGR300B stereo packs a lot of features into a compact round, gauge style design that fits into a standard gauge opening.  Crank up some AM/FM radio, or plug a compatible device into the rear USB/Aux input.  

The large backlit LED display lets you see what you're hearing with just a glance, while the IPX6-rated water-resistant face panel and big, easy-to-use controls are made to resist sun, salt, and moisture.

**Features:**

-   The marine digital media receiver 
-   White LCD Display with Blue Back-lit Illumination
-   Weather Band
-   AM/FM with 18 presets
-   Water-proof, conformal coated circuit boards

**Technical Specifications:**

-   240 Watts peak power
-   Mounting hole - 3" Round
-   Chassis type - Gauge style
-   Presets - 12 FM/6 AM

**In the Box:**

-   MGR300B Stereo head unit
-   Silicone cover
-   Mounting hardware
-   Owner's manual 

\*Sold as an Individual 

**Specifications:**

-   Auxiliary Input: Yes
-   Bluetooth: Yes
-   Color: Black
-   Cover Included: Yes
-   NMEA 2000: No
-   Power - Output (Watts): 240
-   RCA Input: Yes
-   RCA Output: Yes
-   SiriusXM Ready: No
-   Wired Remote Capable: No
-   Wireless Remote Capable: No
-   Box Dimensions: 6"H x 6"W x 7"L WT: 1.95 lbs
-   UPC: 791489132534

  
[Owner's Manual (pdf)](https://productimageserver.com/literature/ownersManual/94388OM.pdf)  
[Brochure (pdf)](https://productimageserver.com/literature/brochure/94388BR.pdf)

## Details

- **Price:** 239.99 USD
- **Type:** Stereos
- **Tags:** Brand_Boss Audio, Entertainment, Entertainment | Stereos

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 239.99 USD | In stock |

## Images

- Boss Audio MGR300B Marine Stereo w/AM/FM/BT/USB [MGR300B] Boss Audio
- Boss Audio MGR300B Marine Stereo w/AM/FM/BT/USB [MGR300B] Boss Audio

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> Source: [Besafe1st](https://besafe1st.com/products/boss-audio-mgr300b-marine-stereo-w-am-fm-bt-usb-mgr300b)
> Updated: 2026-06-01