... Amplifier,power amplifier, 2Fully integrated solution,USB/SD Card Insert 3Subwoofer output 4FM radio,led display FM Boat Hi-Fi Audio Stereo 4 Channel ... AmplifierBrand new Mini Hi-Fi Stereo Amplifier for cars, motorcycles ... With FM radio ,screen displaySpecificationsOutput channel: 4.0channelShell qualitative material: AluminumColor:BlackVoltage: ... Stereo 4 Channel Amplifier