WOCKODER Record Player Turntable Bluetooth (Z002) Suitable for 12 Volts motorcycles, scooters and yachts Specifications of the amplifier: Working Voltage 10-16V DC,MAX power @ 4 50WX2 RMS power @4 25WX2;THD 50dB Channel separation &gt;50dB;Frequency response 20Hz-20kHz Sensitivity 150mv;