Product material: aluminum alloy Product Highlights: High-fidelity power IC for power amplification output Internal structure circuit design, star grounding, low noise, high efficiency, mellow and clean.   Input voltage: DC12V Current requirements: 2A or more Output power: 20WRemote control battery information: one CR2025  shipping with batteryHi-Fi Digital Auto Car Stereo Power Amplifier Sound Mode Audio Music PlayerThis professional car power amplifier supports MP3, CD, DVD. And it is suitable for car, motorbike, boat or home use, and installs easily, so you can operate it and listen to music.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- Voltage: DC 12V 2A above- Port: 2.1 x 5.5mm