Features:
2 channels output digital audio power amplifier.
With RCA audio input interface and volume control knob.
5V USB port for MP3/ MP4 charging.(Power out only)
3 audio modes switcher.
Made of aluminum alloy, lightweight and durable.

Specifications:
Color: Red + Black
Material: Aluminum Alloy
Output Power: 2 * 20W
Frequency Response: 29Hz-18KHz
Total Harmonic Distortion: ＜ 0.4%
Signal to Noise Ration: ≥ 75dB   
Input Voltage: DC 12V 5A
Item Size: 10 * 8 * 4cm / 3.9 * 3.1 * 1.6in
Item Weight: 205g / 7.2oz
Package Size: 14.5 * 9 * 5cm / 5.7 * 3.5 * 2in
Package Weight: 265g / 9.3oz

Note:
Power adapter is not included.
The USB port is for charging only.

Package List:
1 * Power Amplifier
2 * Cables