Bluetooth Marine Radio Boat Stereo Waterproof Audio Receiver Digital Grade Play Gauge Style Marine Stereo with IPX5 Waterproof Design: This bluetooth marine radio is made to resist the marine environment. IPX5 marine grade construction and UV coatings let you don’t need to worry about humidity and saltwater exposure. This waterproof boat stereo is standard tachometer gauge design, required cutout: 2.89″ (diameter) x 2.84″ (depth); and perfects for Boats, Yacht, Motorcycles, Motorbikes, Cars, ATV, UTV, SUV, RV, Golf, Campers, RZR, Harvesters, Truck and more. Bluetooth A2DP Music Streaming: This MP3 boat audio lets you enjoy your streaming music via Bluetooth 5.0 technology. You can wirelessly connect all your favorite devices like smartphone, iPad, tablet, etc. To the marine bluetooth receiver and play your spotify/pandora music with the stable bluetooth signal. Come and enjoy the music wave. Power-off Memory is supported, so the unit can automatically enter track played before last power outage. Lossless Music Experience: This marine gauge stereo supports RCA subwoofer audio output and 4x50W amplifier audio output, lets you immerse in rock music. What’s more, freely control bass/treble/balance/fader and custom preset EQ in the boat audio lets you easily find your music style and enjoy lossless music. Friendly note: working voltage is DC 12V; max power output is 4x 50W. Segmented LCD Display&Illuminated Keypad: This bluetooth boat unit features high-contrast segmented LCD display, which lets you easy to read time, channel, song’s name, etc. The illuminated keypad lets you easy adjust volume, change song, power on/off and more in a dark environment. Read the manual carefully or go to shop for professional installation is highly recommended.