What's in the box:

Multifunctional 2.1 Subwoofer Speaker Amplifier Board Portable Audio 30W Sub AMP with Independent 2.0 Output (1)

Basically cover the entire civil audio, with 2.0 independent channel output, you can easily implement a 2.1 speaker system.

Features:
Adopt full patch process, with aluminum back plate, lightweight and practical.
There is almost no noise, and with fine control.
It has nice excitation and dynamic Q value control, which can be comparable to the sound of traditional analog-power amplifier.
It is a perfect subwoofer amplifier board for home theater.
Multifunctional but easy and convinient to operate.

Specifications:
Type: with BT function, without BT function (optional)
Color: black
Material: plastics+metal
Power: 30W * 2
Input voltage: 15-22V
Opening size: 96 * 106mm
Sink hole depth (aluminum plate thickness): 2.5mm
Item size: 116 * 126mm / 4.6 * 5.0in
Item weight: 200g / 7.1ounce
Package size: 150 * 140 * 50mm / 5.9 * 5.5 * 2.0in
Package weight: 240g / 8.5ounce

Packing List:
1 * Speaker Amplifier Board