Features: Enjoy improved sound quality with this 3.5mm/RCA noise reduction set. Designed for various RCA and 3.5mm devices, this device isolates external interference for better sound. Suitable for music enthusiasts, professionals in the home theater industry, and video conferencing users. Use it in different settings such as KTV projects or video conference system, easily switching between shared ground and isolated ground modes. Crafted from durable aluminum alloy, this noise reduction device ensures long lasting use and is a must have for any sound setups. Specifications: Material:Aluminum Alloy Size:Approx.8.5x5.3x2.9cm/3.35x2.09x1.14in Color:Black,Gray;(Optional) Package Includes: 1xGround Loop Noise Isolators note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.