Compact size stereo power amplifier. Two main channel output. Left and right channel outputs are interfaces for speakers. Low distortion supplies a clear, strong and more powerful sound. Made up of fine quality material, thick, light weight and practical. knobs are designed with LED light to make the product more beautiful. Power:20Wx2 Load impedance:4-16ohm :85db Frequency:20Hz-20KHz HighPitch control:12dB±10KHz Bass control:12dB±100Hz Power Plug:5.5x2.1mm Colour:As Shown Material:Metal Size:.13.5cm/5.31inch x 7.5cm/2.95inch Package Contents: 1 * Car amplifier Only the above package content, other products are not included. Note: Light reflection 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.