Item Type: Noise Suppressor Material: ABS Feature: Antenna amplifier power supply cable switched 12V. Enhance the radio signal and reduce the noise. Copper signal wire, strong anti interference, providing better signal. Able to provide high output current, low harmonic distortion and cross, ensure security operation. Package List 1 x Noise Suppressor 1Noise Suppressor: Eliminates unwanted noise and hum without altering car audio natural tone. It's the perfect pedal to quiet down any pedalboard or effects setup. 2High Performance: Able to provide high output current, low harmonic distortion and cross, ensure security operation, preserves the natural attack and envelope of an instrument's sound. 3Better Sound: Enhance the radio signal and reduce the noise. Copper signal wire, strong anti interference, produces filtration effect, make the sound effect is better. 4Unique Design: Unique noise detection circuit preserves the natural sound. Eliminate ground loop buzzing noise between an audio source and an amplifier. 5Safe Operation: The body item is covered by copper material, having high temperature and melting resistant function. Prevent the item from short circuits. Keep safe in your car.