Starcn Sliver LP-2020A Lepai Class-D Hi-Fi Audio Mini Amplifier with Power Supply Class -D 2020+ amplifier chip provides efficient, powerful sound, blue LED light ring round Volume Knob;Bass/Treble tuning. Engineering for proven performance, reduced signal interference, and long operational life,Class D is better than Class T. State of the art design using surface mount components and advanced, the aluminum enclosure material for Light weight yet sturdy, also easy to distribute the heat. Support both L/R RCA and 3.5mm Stereo inputs, Can be plug in with Ipod,MP3/MP4.Convenient Speaker output, Tone/Direct Switching. Mini size easy to installation, 20-watt output makes it perfect for both home and car/motorcycle bike/boat audio applications!