Feature 1Simple Operation Mode: Each channel has added a switch button, which makes the switch between mono and stereo audio input more convenient and intuitive. 2Suitable 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. 3Independent Volume Control: The independent volume control allows each audience to determine their own volume through a dedicated output volume control knob. 4With A Wide Range of Applications: Our 4 channel headphone amplifier is suitable for mixing most electronic instruments and microphones. 5Good Features: 4 channel line mixer has low noise, high sound quality, strong configuration, and it is small but powerful.SpecificationItem Type:4ChannelAudioMixerProduct Material: MetalWeight: Approx. 406g / 14.3oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Mixer1 x Connecting Line1 x Adapter1 x Manual