Features: USB/SD card reader input, with remote control, digital transfer station radio, 2-channel output, high-fidelity cars/motorcycles/computers audio amplifier TDA7377 Integrated Circule RCA Stereo Inputs Power & High Level Input & Speaker with Waterproof Connectors? Advanced BTL with FM/USB/SD integrated circuit design? Supports U disk, SD, MMC digital card and MP3 playback High and Low Pass Filter Switch Specifications: Input Voltage: DC12V Frequency Response: 20Hz to 20KHz Output Power: 20w+20w 1KHz champions Harmonic Distortion: ==85dB High Control: 12dB¡À10KHz Bass Control: 12dB¡À100Hz The Signal Level: 220MV 47K Reader/U-disk Format: MP3, WMA/FM FM Frequency Range: 87.5MHz¡ª108MH Color: Red Material: Aluminum Dimension: 6.3x2x4.3 inches SKU: A8CA00031 Package includes: 1 * Amplifier Power(Power adapter is not included) 1 * Remote Control 1 * User Manual