What's in the box:

MX400 Ultra-compact Low Noise 4 Channels Line Mono Audio Mixer with Power Adapter (Silver)

Features:
Ultra compact 4 channels input and 1 channel output line MONO mixer.
Each input channel can be adjusted volume individually.
With highest sonic quality even at maximum output level.
Ultra low noise 4580 operational amplifier for outstanding audio performance.
Comes with a DC 12V power adapter.

Specifications:
Material: Metal
Color: Silver/ Black(optional)
Item Size: Approx. 10.5 * 5.5 * 4.5cm / 4.1 * 2.2 * 1.8in
Item Weight: 182g / 6.4oz
Package Size: 22.5 * 14 * 8.5cm / 8.9 * 5.5 * 3.3in
Package Weight: 378g / 13.3oz

Package List:
1 * Mixer
1 * Power Adapter
1 * User Manual (English)