LEMONBEST Super Bass Hi-Fi 2.1 Stereo Car Amplifier Booster Subwoofer Mini Audio Amplifier CD MP3 MP4 AMP 12V Boost your MP3, MP4 or other stereo system's sound with this compact 2 channel hi-fi amplifier. Channels: 2 + 1 Super Bass; High quality stereo sound + heavy bass output. capable to drive the audio signals from MP3, MP4, CD, Radio, DVD.Fits perfectly for a car, motorcycle or boat. Treble, bass and volume control. an integrated amplifier, combine all the functions, hooking is very simple. Smart, light weight aluminum casing. Mini size and easy to install by DIY without the use of manual.