RCA Audio Ground Loop Isolator Anti-Interference Noise Reducer Eliminate Current Sound Bluetooth Receiver 1. Shell material: ABS 2. Stereo sound quality, delicate and transparent, effectively remove the interference noise in the transmission of audio signals 3. RAC interface, plug and play, metal plug, no need to download and install any software 4. Easy to use, plug and play, no batteries, compact and portable, does not occupy space 5. Pure sound quality, no rock music damage, give you a better experience, can be used on mono channel 6. Works with any portable device with 3.5mm audio jack, suitable for car audio systemhome stereo 7. Eliminates hum, eliminates hum caused by ground loops when the audio source and (some car speakershome audio systems) use the same power source for clear music enjoyment 8. The product can only eliminate the noise and current noise caused by common power and common ground products, but not eliminate the noise caused by other reasons, so you need to confirm the source of noise by yourself 9. Weight: about 56g 10. Size: about 7.5 x 3.7 x 2.1cm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.