The GUZARE Marine MP4 Stereo Receiver (Model GR308) is a waterproof gauge-style audio head unit designed for marine and outdoor 12V applications. It supports video playback, Bluetooth audio streaming, and multiple media input options, making it suitable for boats, golf carts, ATVs, UTVs, and similar recreational vehicles. This unit requires a DC 12V external power supply for operation. It features an integrated AM/FM radio, rear USB cable for MP3/MP4 file playback from a flash drive, AUX input, and RCA line output for connection to external audio devices. Bluetooth functionality allows wireless music streaming from compatible mobile devices. The line output can be used to connect an external amplifier if additional audio output is required. The GR308 is equipped with a color display designed for clear menu navigation and video playback. The screen provides stable brightness and contrast for general outdoor viewing conditions. Built for outdoor use, the unit features an IPX6-rated water-resistant design to help protect against splashes and moisture. It supports US and EU FM/AM frequency bands and uses a compact gauge-style form factor for straightforward dashboard installation.