Features: 1.Mono Operation: The mini audio mixer is a mono mixer with 4 channels input and 1 channel output. 2.Simple Adjustment: The volume of each input channel can be adjusted individually, and high sound quality can be produced at the maximum output level. 3.Excellent Performance: Ultra low noise 4580 operational amplifier, no distortion and easy to set up, with excellent audio performance. 4.1/4in TS Input and Output: 1/4in TS connector is used for input and output connection, wiring is simple and easy to adjust. 5.Compact Format: Metal shell structure audio mixer, small and compact, very suitable for home recording studios or small clubs. specification:Item Type: 4 Channel Line Mixer Material: Iron Colour: Black Product Adapter: 50/60Hz 12V/1A (EU Plug 100-240VAC) Input: 1/4in TS connector Minimum Impedance: 4.7k Maximum Input Level: +16dBu Output: 1/4in TS connector Impedance: About 80 Maximum Output Power: +16dBu PackageList:1 x Mixer 1 x Power Adapter 1 x User Manual