This amp's compact size makes it easy to add music to nearly any bike 80 watt max power (40 watt RMS) Bluetooth« audio (AVRCP, A2DP) allows you to play music stored on a Bluetooth«-equipped phone or MP3 player with no wires Waterproof (IPX6) Illuminated program button 4 Ohm - 8 Ohm stable Operating voltage: 10 - 18VDC Frequency response: 20 Hz - 20 KHz Red LED power indicator Epoxy potted enclosure Corrosion resistant (ASTM B117). BLUETOOTH H2O PROOF AMP