3.5mm Stereo Audio Switcher: Bidirectional switching Splitter Audio Sharing active speakers and headphones. 1: Connect 2 audios to (IN or OUT)1 and (IN or OUT)2, use the 1 or 2 switch to get an output. 2: Connect an audio to IN or OUT, select an audio output between (IN or OUT)1 and (IN or 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 't affect the sound quality at all. Colour: black Material: plastic Package Contents: 1 x 3.5mm Audio Switch Switcher 1 x 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 a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.