What's in the box:

Mini Digital Hi-Fi Power Amplifier 2.1CH Subwoofer Stereo Audio Player Car Motorcycle Home Power Amplifier (Standard)

Lightweight, has a matt silver casing and allows for full control of your volume, treble and bass output. It also has a jack for plugging your MP3, MP4.

Features:
Fine quality stereo sound and heavy bass output.
With MP3, MP4 input jack.
Low distortion.
Nice for use on your vehicle or your home.
All aluminum, the surface of machine made by wire drawingoxidation process.
Adjust the high and low frequency separately, let you find your favorite frequency band.

Specifications:
Color: silver
Material: aluminum alloy
Resolution: 47K
Impedance: 4-8
Power: 20W+20W
Distortion: 0.4%
Item size: 150 * 90 * 35mm / 5.9 * 3.5 * 1.4in
Item weight: 270g / 9.5ounce
Package size: 160 * 135 * 45mm / 6.3 * 5.3 * 1.8in
Package weight: 300g / 10.6ounce

Packing List:
1 * Power Amplifier