[2 Port 3.5mm Audio Switch] Method 1: Connect 2 audio devices to (IN/OUT)1 and (IN/OUT)2, use the 1/2 switch to select output. Method 2: Connect an audio source to IN/OUT, select output between (IN/OUT)1 and (IN/OUT)2; output can be switched between speakers and headphones. [No External Power Required] Plug and play design requires no external power supply, allowing easy music playback without affecting sound quality. Note: Only one audio source is output at a time (switch between two sources). [One-key Mute Button] The audio selector features a one-touch mute function to quickly stop playback. This mute button is convenient and useful for temporarily silencing audio. [Widely Compatible] Supports most 3.5mm audio devices such as smartphones, headphones, PCs, MP3/MP4 players, and game consoles. Easily switch audio between PC and Mac or toggle computer sound between headphones and speakers as needed. [Premium Material & Compact Size] Constructed of durable matte black metal with a solid feel. The compact design saves space and is ideal for desktop or portable use. Material: ABS Color: Black Package Contents: 1 x 3.5mm Audio Switch 1 x 3.5mm Audio Cable Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement may vary by +/- 1-3cm.