[20W+20W 2CH Output]-- 20W+20W mini amplifier, the max power out can reach to 200W+200W, providing much better sound quality and shocking auditory effects. Comes with 12V 3A power supply, available for 2-10 inches speakers.[Bass & Treble & Volume Adjustment]-- Features responsive buttons for the power switch and knob control for the master volume adjustment. it can be adjusted according to your needs.[ Size]-- Made up of aluminum alloy body, with blue LED lights for the knobs, the bookshelf speaker sound amplifier features a mini size, easy to bring anywhere it is needed.[Application]-- Compatible with a of digital products, it can automaticly search and support FM radio frequency. It's perfect for your karaoke and home theater acoustic and , motocycles or boats applications.Colour:blackMaterial:metalPackage Contents:1 x Mini power amplifier1 x English manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.