Features:Mix 4 audio inputs--audio mixer can connect 4 devices(like keyboard, instruments, etc.) to 1/4-inch TS connectors, mix down 4 signal inputs into 1 signal output.Adjust the volume--each channel input has its own volume adjustment; rotate rotary knobs to easily control volume level.Adopt good material--made of metal housing, it is solid, durable; black coating resists rust; there are non-slip silicone pads on the bottom.Take it to anywhere--lightweight and compact audio mixer, smaller than the palm, saves space, allows easy carry.Offer high sound quality--featured with low noise operational amplifying circuit, it performs well, delivers clear sounds with no distortion.Specifications:Material: metal + electronic componentsColor: black Adapter: input--100-240V, output--12V/1AInterface: 1/-inch TS connectorInput Impedance: min. 4.7kΩMax Input Level: +16 dBuOutput Impedance: approx. 80ΩMax Output Level: +16 dBuItem Size: approx. 46.5*57.2*103.6mm / 1.83*2.25*4.07inItem Weight: 370g / 13.05ozPackage Size: 14*9.5*7.5cm / 5.51*3.74*2.95inPackage Weight: 305g / 10.75ozNote:Audio mixer only, other accessories in the pictures are not included.Please read the user manual carefully for more information, before usage.Due to lighting or other reasons, the picture and material object may slightly differ.Due to manual measurement, there may be deviation, please in kind prevail.Packing List:1 * Audio Mixer1 * Adapter1 * User Manual