[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 & & 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:black Material:metal Package Contents: 1 x Mini power amplifier 1 x English manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.