iFutniew 4 Channel Stereo Audio Mixer Support Input and Output Mini Passive Stereo Mixer with Separate Volume Controls

[ No Need Power Supply ] No Power Supply Requirement. Plug and Play, Metal Housing, and Sturdy. [ Input and Output ] With 4-Channel (L&R) Input and 1-Channel (L&R) Output, Convenient to Use. [ 4 Separate Volume Controls ] Each Channel Has an Volume Control, Adjust the Volume as You [ Stereo Audio Mixer ] 4-Channel Audio Mixer Can Mix 4 Stereo Audio Signals Can Mix Mixing Instrument, CD Player, Tape Player, Computer, Mobile Phone, Tablet Audio Signals to Speaker and Headphone. [ Ultra Low Noise ] Better Sound Quality Even at Maximum Output Levels, Provide an Excellent Audio Performance.