Ultra-compact 4-channel input and 1-channel output line mono mixer. The volume of each input channel can be adjusted individually. It has the highest sound quality even at the maximum output level. Ultra-low noise operational amplifiers provide excellent audio performance. Comes with a DC 12V power adapter. Line Inputs Type:1/4 connector Impedance:min 4.7 Max input level:+16 dbu Output Type:1/4 connector Impedance: 80 Max output level:+16 dbu Power Supply Power Supply:external power supply,12 V : = / 150 MA Power Range China:220 V- , 50 Hz USA / Canada:120 V- 60 HZ U K / Australia:240 V- , 50 HZ Europe:230 - . 50 Hz japan:100V- , 50 / 60 Hz Plug Type: EU Plug, it applies to Indonesia, Germany, France, Spain, Italy and so on. Colour: black Material: metal Size: 10.5x5.7x3.2CM Package Contents: 1 * Mixer 1 * PLUG Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.