3.5mm Stereo Audio Switcher: Bidirectional switching Splitter Audio Sharing active speakers and headphones. Method 1: Connect 2 audios to (IN/OUT)1 and (IN/OUT)2, use the 1/2 switch to get an output. Method 2: Connect an audio to IN/OUT, select an audio output between (IN/OUT)1 and (IN/OUT)2; (The output can be switched between speakers and headphones). One-key mute, convenient and fast, very practical in special situations. Plug and play; No External Power Required; Won't affect the sound quality at all. Colour: black Material: plastic Package Contents: 4 * 3.5mm Audio Switch Switcher 4 * 3.5mm Audio Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.