Features:
The passive mixer module is sent in assembled.
Four channels, each with an independent volume adjustment button.
No battery or other power source required, easy to use.
Small and compact size, easy to carry.
Superior sound quality with ultra-low noise.
High quality components and strong structure.

Specifications:
Type: 4-in-1-out 
Material: PVC+copper
Input Impedance: 10K ohms~47K ohms
Output Impedance: 2.5K ohms~10K ohms
Gain: -12dB MAX
Item Size: 85 * 55 * 26mm / 3.35 * 2.17 * 1.02in
Item Weight: 106g / 3.75oz
Package Weight: 169g / 5.98oz
Package Size: 14.8 * 9 * 7.5cm / 5.83 * 3.54 * 2.95in

Packing List: I8692-1
1 * Mixer
1 * Manual (English)