Description: Simple Switching: mixer audio is divided into two channels. Stereo version male connectors of 1 / 4 inch TRS stereo audio cable must be used for input and output connections (1 / 4 inch male to male stereo audio cable) then press the toggle key. Mono version mix mono signal inputs into 1 mono signal output (1 / 4 inch TS male to male connector for input and output connection) DC 5V :The digital mixer uses the latest DC 5V mode, so no longer restricts the application scenarios. Multi function :The audio mixer collects sound from many different sources (guitar, bass, and keyboard) into a routing position . Each channel the mixer has an single volume control, single input adapter and volume control for each channel, and a single output from extension. It mixes multiple channels into one track, suitable for your keyboards, small stage setups, drum sets, or sub mixes. Low noise:Mini audio mixer produces the highest sound quality at all output levels Distortion free and easy to set up, ideal for quickly mixing line level signals without complexity. The 4 channel mixer produces the highest signal quality with the highest signal integrity, even at the highest levels Gift: It is ideal for multi keyboard devices and recording.the suitable gift for friends or family who loves music Specification: EU adapter Size Chart: 10.8cmx7.5cmx3.1cm/4.25inchx2.95inchx1.22inch Package Includes: 1 Audio Mixer 1 EU adapter Note: Please allow slightly errors due to manual measurement and different monitors.