Main Functions:Can play U disk SD/MMC card for music and FM stereo radioParameters:1.Input voltage DC 12V 2.Frequency response: 20Hz~20kHz3.Output power: RMS 40W 1KHz4.Harmonic distortion:<0.05% 4W 1KHz5.SNR: 85dB6.High control: 12dB+/-10KHz7.Bass control:12dB+/-100Hz8.The signal level: 220MV 47K9.Reader，U-disk format:MP3 FM10.FM frequency rang:87.5MHz~108.0mhZPackage include:1x bluetooth amplifier1x remote control