Features:
HiFi power amplifier, great to have a mellow and plump sound.
2 channels audio input (L & R), 4-wire signal output.
Built-in Speaker protection circuit & starting delay circuit.
High-quality aluminum alloy case, exquisite and durable.

Specifications:
Material: Aluminum alloy
Power: 20W, 4ohm; 12W, 8ohm  
SNR: =85dB
Powered by: DC 12-15V
Power adapter: US Input: 100-240V 1A 47-63Hz
                                 Output: 12V 3.8A
Item size: Approx.14.5 * 8.5 * 4cm / 5.7 * 3.3 * 1.6in
Item weight: 347g / 12.3oz
Package size: 25 * 18.5 * 7cm / 9.8 * 7.3 * 2.8in
Package weight: 772g / 27.2oz

Package List:
1 * Power amplifier
1 * Power adapter(US)
1 * Manual(English & Chinese)