Shark Shklxmt723 Waterproof Motorcycle Fm Radio/Amp / Aux in Audio Out Clock. 100% waterproof amp radio Built-in FM radio, Radio Frequency range 87.5--108MHz Dot Matrix LCD FM frequency display RMS power @8 50X2 Frequency response 20Hz-20kHz Aux In Audio Output Clock function 12V DC power supply,for 12 Volts motorcycles, scooters and yachts. works with all shark speakers