[2 Port 3.5mm o Switch] Connect two o devices to (IN/OUT) 1 and (IN/OUT) 2, then use the 1/2 switch to select one output. Alternatively, connect one o source to IN/OUT and choose between outputting to (IN/OUT) 1 or (IN/OUT) 2. 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 any additional setup. Does not affect sound quality. Note: Only one o source is output at a time; you can switch between the two inputs. [One-Key Mute Button] Features a one-touch mute button for quick playback interruption. This mute function is convenient for temporarily silencing o when needed. [Widely Compatible] Supports most 3.5mm o devices such as smartphones, headphones, PCs, MP3/MP4 players, and game consoles. Easily switch o between devices, such as switching computer o from headphones to speakers and back as needed. [Premium Material & Compact Size] Constructed from durable black metal with a solid, high-quality feel. Its compact design saves space and is ideal for desktop or portable use. Material: ABS Color: Black Package Contents: 1 x 3.5mm o Switch 1 x 3.5mm o Cable Note: The package includes only the items listed above. Other accessories or products are not included. Lighting and display differences may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.