?Features:
Audio mixer with 4 channels input and 1 channel output.
Each input channel can be adjusted volume individually.
With a master volume knob for controlling the output volume.
Compact size and metal shell£¬ lightweight and durable.
Dual power supply: power adapter(Included) and 9V battery(Not included).

Specifications:
Color: Black
Material: Metal
Power Adapter: US Plug
Input: 6.35mm Interface
Output: 6.35mm Interface
Item Size: 15 * 8.5 * 5.5cm / 5.9 * 3.3 * 2.2in
Item Weight: 362g / 12.8oz
Package Size: 20.5 * 15.5 * 7cm / 8.1 * 6.1 * 2.8in
Package Weight: 774g / 1.7lb

Note:
The battery is not included.
You need to open the bottom cover with a screw to install battery.

Package List:
1 * Mixer
1 * Power Adapter(US)
1 * Cable