Kinter MA-150 Amplifier Digital Stereo Amplifier For Car Motorcycle and Boat (Max Power = 40 watts) Power & High Level Input & Speaker with Waterproof Connectors Super Heavy Duty Aluminum Case that keeps the unit cool Output Power: RMS 75 WattsX2CH.(at 14.4V DC) Loading in 4 Ohm Speaker Package included only kinter MA-150 500W USB Stereo Amplifier High and Low Pass Filter Switch