2 Port 3.5mm Audio Switch: Connect two audio devices to (IN/OUT) 1 and (IN/OUT) 2, then use the 1/2 switch to select one output. Alternatively, connect one audio source to IN/OUT and choose between (IN/OUT) 1 and (IN/OUT) 2 for output. The output can be switched between speakers and headphones. No External Power Required: Plug and play design requires no external power supply, allowing you to enjoy music without affecting sound quality. Note: Only one audio source is output at a time; you can switch between the two inputs. One-Key Mute Button: The audio selector features a one-touch mute function for quick playback stop. This convenient mute design is ideal for temporarily silencing audio as needed. Wide Compatibility: Supports most 3.5mm audio devices such as smartphones, headphones, PCs, MP3/MP4 players, and game consoles. Easily switch between PC and other audio sources, or toggle computer audio between headphones and speakers as needed. Premium Material and Size: Constructed entirely of durable black metal for a solid, high-quality feel. Compact design saves space and is easy to place. Material: ABS Color: Black Package Contents: 1 x 3.5mm Audio Switch 1 x 3.5mm Audio Cable Note: Light reflection and differences in display screens may cause slight variations in the color of the item shown. Measurement may vary by +/- 1-3cm.