Lepy LP-2024A+ Digital 2 x 20W Hi-Fi Audio Mini Amplifier Stereo Power Amplifier Car Amplifier with Power Supply RCA Input ,Can be plug in with CD, DVD, computer, MP3 / MP4, digital music player Mini size easy to installation by DIY without manual, especially good fit for car, motorcycle bike,boat, every where! It has Blue LED light ring round Volume Knob;Bass/Treble tuning. Aluminum alloy solid case and also easy to distribute the heat. Dimensions: (W)140mm x (H)39mm x (D)92mm