Filter noise to restore sound quality. Common ground isolation module eliminates current noise. Effectively reduce noise caused by ground loops. Achieve clear signal transmission by removing interference from connections and solving AC hum caused by site interference and other factors. Isolate potential differences between two systems to prevent excessive voltage from entering the equipment. Ideal for vehicle use with RCA audio equipment to eliminate noise from co-located car devices and enjoy pure sound quality. Connect power amplifier to TV to remove noise and humming, restore original audio, enhance viewing experience with improved sound quality. Note: Due to different production batches, printed text on the product may vary slightly. This does not affect functionality. Name: Audio Isolator Interface: RCA Line Length: 12cm Function: Eliminate noise and humming Color: As shown in picture Material: Alloy + PVC Package Includes: 1 x Audio Isolator (Other items not included) Note: Due to lighting effects and monitor settings, the color of the item may vary slightly from images. Measurement error allowed: +/- 1-3cm.