3.5mm Stereo Audio Switcher: Bidirectional switching splitter for audio sharing between active speakers and headphones. 1: Connect 2 audio sources to (IN/OUT)1 and (IN/OUT)2, use the 1/2 switch to select one output. 2: Connect one audio source to IN/OUT, select one audio output between (IN/OUT)1 and (IN/OUT)2; (output can be switched between speakers and headphones). One-button mute, convenient and fast, practical in various situations. Plug and play; no external power required; does not affect sound quality at all. Color: Black Material: Plastic Package Contents: 1 * 3.5mm Audio Switcher 1 * 3.5mm Audio Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.