Features 1、4 Channel Sound Mixer: This sound mixer features 4 sets of 6.35/3.5mm inputs and 1 set of 6.35/3.5mm outputs, compatible with most audible devices such as CD players, computers, smartphones, preamplifiers, and amplifiers 2、Independent Control: It supports both stereo and mono modes, with each channel featuring an independent mono or stereo switch. This allows for the mixing of different audible signals to meet a wider range of mixing needs 3、LED Level Display: Built in 16 bit stereo double color LED level meter, it displays modes, colors, and gain levels, which can be freely adjusted to suit different usage scenarios. This enables easy viewing of output levels and dynamically enhances your listening and mixing space 4、Rich Adjustment Options and Easy Use: Includes a main volume knob and 4 independent volume knobs, allowing for separate control of the input levels for each channel without interference. Powered by a USB cable, no separate power supply required, easy to use in most situations 5、Robust Construction: Featuring a full metal casing and aluminum knobs, this mixer is sturdy and long lasting, maximizing isolation from external interference signals. Gold plated terminals ensure a tight connection and stable transfer of the original sound signal, minimizing loss Specifications: Item Type: 4 Channel Sound Mixer Product Material: Iron, Aluminum Alloy Audible Input: 4 sets of 6.35/3.5mm Jacks Audible Output: 1 set of 6.35/3.5mm Jack Headphone Impedance: 16-200Ω Input Impedance: 50kΩ Channel Mode: Stereo/Mono Display Color and Mode: Switchable Display Gain: 1-6 Levels Power off Memory: Support Power Interface: Type C USB Size: Approx. 132 x 86 x 24mm / 5.2 x 3.4 x 0.9in Package List 1 x 4 Channel Sound Mixer 1 x USB C Data Cable 1 x User Manual