Feature: 1. STEPLESS VOLUME CONTROL: The 3.5mm volume control knob allows you to fine tune sound levels to your desired preference, supporting stereo with independent left and right channel balance adjustment, giving you complete control over your listening experience. 2. LOSSLESS SOUND QUALITY: Featuring a sophisticated ground isolation circuit design, this controller ensures zero attenuation of sound signals, delivering lossless sound with precise accuracy and crystal clear clarity for an exceptional auditory experience. 3. QUALITY BUILD: The selector boasts a robust aluminum alloy housing that offers excellent durability, signal isolation, and EMI/RFI shielding for more good performance and extended product lifespan, making it a worthy investment for sound enthusiasts. 4. EASY TO USE: With a no clutter design, no need for tangled cables and complicated setup, and no power required, it's plug and play design allows you to switch connected sound lines easily to select output/input devices, making it user friendly for anyone. 5. WIDE COMPATIBILITY: Compatible with a wide range of devices featuring 3.5mm interfaces, it's ideal for small sound signal control, commonly used between sound sources and amplifiers, preamps and amplifiers, and sound sources and powered speakers, including CD players, digital sound players, mixers, amplifiers, and more. Specification: Item Type: Volume Control Box Material: Aluminum Alloy Color: Black Adjustment Method: Potentiometer, Independent adjustment of left and right channels Rext: 50K Stereo Interface: Input: 3.5mm (1/8in) Output: 3.5mm (1/8in) . Package List: 1 x Volume Control Box Note: Do not adjust the speaker directly, do not adjust the headset volume.