VicTec Car Mini Hi-Fi Audio Speaker Amplifier Bass Vol Treble With In-Car DC Powered Adapters Comes with the high-quality RCA Input/Output block The Power button and the volume displayed by the LED seven colors aperture:high pitch, bass, balance, volume control This mini amplifier comes complete with in-car DC power adapters, so you can hook this device to your car audio system and enhance your music listening while on the road Whether you have floor-standing speakers, bookshelf speakers, or simply want to add a bit more presence to your inexpensive sound system, this mini amplifier is a quick and easy way to enhance the stereo sound quality of your Car Speaker System, Home Speaker System Easily control the bass, treble, and master volume so you can get the perfect sound every time