1、Simple Operation Mode: Each channel has added a switch button, which makes the switch between mono and stereo audio input more convenient and intuitive. 2、Suitable for DC 5V Power Supply Mode: 4 channel audio mixer is applicable to DC 5V power supply mode and convenient for customers to use in various occasions. 3、Independent Volume Control: The independent volume control allows each audience to determine their own volume through a dedicated output volume control knob. 4、With A Wide Range of Applications: Our 4 channel headphone amplifier is suitable for mixing most electronic instruments and microphones. 5、Good Features: 4 channel line mixer has low noise, high sound quality, strong configuration, and it is small but powerful. Item Type: 4 Channel Audio Mixer Product Material: Metal Weight: Approx. 406g / 14.3oz 1 x Mixer 1 x Connecting Line 1 x Adapter 1 x Manual