Features:- DC 12 V power supply for car and motorcycle.- Treble / Bass / Volume control.- CD DVD MP3 input.- Power on/off control.- Two main channel output.- Professional level input operational amplifier IC for circuit design， sound， transparent， bright.- Four electronic keypad control help you operate the amplifier easily.- Selected high-power four-channel professional power amplifier integrated circuits， minimal distortion strong power.- Filtering and large capacity power circuit.- DSP sound field pattern of the four.Specifications:- Jack Input: Standard stereo jack- Input Voltage: DC 12V- Output Power: RMS 2 x 20W 1KHz- Frequency Response: 20Hz - 20kHz- SNR: 85dB- High Control: 12dB plus / minus 10KHz- Bass Control: 12dB plus / minus 100Hz- The Signal Level: 220MV 47K- Material: Aluminum alloy shell Model : HY - 2001 Material : Aluminum alloy Color : Red Special function : Car power amplifier supports USB， MP3， FM， SD， DVD ArrayPackage weight: 0.256 kg Product size (L x W x H) : 12.5 x 7 x 4 cm / 4.91 x 2.75 x 1.57 inches Package size (L x W x H) : 13 x 10 x 4.5 cm / 5.11 x 3.93 x 1.77 inches Package contents: 1 x HY-2001 12V USB SD DVD FM Car Motorcycle Stereo Radio MP3 Player Auto Car Mini HiFi Digital Power Amplifier with Remote Control1 x User Manual