BOSS Audio Systems MGV520B Marine Audio Stereo System Gauge Receiver – Bluetooth Head Unit, Digital Media, No CD Player, MP3, Built-in 4 Channel Amplifier, Weatherproof, USB Audio, USB Charging Upgrade your sea vessel with the BOSS Audio Systems MGV520B IPX6 Weatherproof marine gauge receiver. The front & rear camera inputs let you clearly see what is going on via the 3” color TFT display. Turn up the AM/FM radio, hook your smartphone or MP3 Player up through the Auxiliary input or plug into the USB port for more music. USB charging available. Bluetooth technology lets you play and control your favorite music apps. State-of-the-art weatherproofing materials and UV coatings provide protection from the elements. Marine Gauge Receiver – Weatherproof, 3 Inch LCD, Built-in Amplifier, Bluetooth, Digital Media MP3 Player, No CD Player, USB Port, AM/FM Radio Upgrade your sea vessel with the BOSS Audio Systems MGV520B IPX6 Weatherproof marine gauge receiver. The front & rear camera inputs let you clearly see what is going on via the 3” LCD. Turn up the AM/FM radio, hook your smartphone or MP3 Player up through the Auxiliary input or plug into the USB port for more music. USB charging available. Bluetooth technology lets you play and control your favorite music apps. State-of-the-art weatherproofing materials and UV coatings provide protection from the elements.