Usage Tips:4-channel line stereo mixer allows you to mix microphone, guitar, bass, keyboard, electronic drum, etc. and enjoy the reverb you made. Ultra low noise design, no hum hissing and audible noise added into the system, pretty transparent, fluent sound streaming. With 5 volume knobs, supports individual volume adjustment of 4 inputs and 1 output. With DC 5V USB interface, the mixer can be powered by adapter, power bank, laptop, etc. Suitable for DJ, club, bar, party, studio, stage or more. Made of Iron, sturdy and durable. With anti-slip mats in the bottom, stable to use. Mini size, portable and lightweight. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. Plug Type: EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC220V/AC110V Colour:Black Material:Iron Package Contents: 1 x Audio Mixer 1 x USB Cable 1 x Power Adapter 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.