New Digital amplifier car stereo amplifier with usb digital display karaoke amplifier,digital amplifier,usb amplifier. MA-009Digital amplifier car stereo amplifier with usb input1.Input voltage 220V. dc12v2.Frequency response: 20Hz ... 47K3.Reader, u-disk format: MP3, WMA/FM4.FM FREQUENCY RANGE-----87.5MHz108MHColour:black. car stereo amplifier with usb sd fm digital display car stereo amplifier