Mini audio mixer is a stereo 4-channel mixer for you to mix microphone, guitar, bass, keyboard, electronic drum, etc. and enjoy the reverb you made. It has ultra low noise and volume adjustment, is suitable for DJ, bar, party, studio, stage or more. Features: 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, bar, party, studio, stage or more. Made of high quality metal, sturdy and durable. With anti-slip mats in the bottom, stable to use. Mini size, portable and lightweight. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Plug: EU/ US (Optional) Color: Black Material: Metal Input: AC 100-240V, 50/ 60Hz Output: DC 5V Item Size: 108 * 76 * 32mm / 4.25 * 2.99 * 1.26in Item Weight: 242g / 8.52oz Package Size: 15.5 * 11 * 8.5cm / 6.10 * 4.33 * 3.35in Package Weight: 391g / 13.80oz Package List: 1 * Audio Mixer 1 * USB Cable 1 * Power Adapter