DOODBI 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. 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. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. We usually respond within 24 hours on weekdays. Thank you for shopping at our store!