YDF 4 Way 35mm Stereo Audio Switch AUX 35mm Audio Switch Audio Switcher Passive Speaker Headphone Manual Selector Splitter Box Audio Sharing 41 in 14 Out

4(1)-IN-1(4)-OUT Mini 3.5mm Audio selector designed for customers having several audio sources and outputs., ❶ Select audio input between (IN/OUT)A/B/C/D with 1/4 switch knob and get one output., ❷ Select audio output between (IN/OUT)A/B/C/D to receive one input., 4 channel switch knobs, fully isolated independent circuit, make sure that each signal is not affected by the other three channels., Totally No Noise and No Sound Interference. Plug and play， No power needed， Won't affect sound quality.