Welcome to the store! This is a mini power amplifier for 2.0CH speakers. Treble, bass, and volume adjustment knobs for easy operation. Supports AC/DC12V power supply, suitable for home and car use. Left and right channel output, rated power 20W + 20W. Super mini size amplifier can be held in one hand. Note: Power adapter is not included. It supports 12V 2A-5A power supply, and the power interface size is 2.5x5.5mm. Specifications: Rated Power: 20W+20W Load Impedance: 4-16Ω Frequency: 20Hz-20KHz SNR: 90db Color: Black Material: ABS+Aluminum Alloy Size: 13.3x11.3x5cm Package Contents: 1 * Audio Amplifier 1 * User Manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be a little different from the real thing. The measurement allowed error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!