ELEGIANT 20W 12V Mini Hi-Fi Amplifier Booster Radio MP3 Stereo for Car Motorcycle Home Mini size and easy to install DIY without the use of manual. Fits perfectly for a car, motorcycle or boat. Total harmonic distortion less than 0.4%, PROVIDING you perfect Audio Quality. Capable to drive the audio signals from MP3, MP4, CD, Radio, DVD. It is an INTEGRATED amplifier, COMBINING all the functions, hooking IT UP is very simple.