BETTER SOUND - Improve radio signal and reduce noise. The copper signal wire, strong anti-interference, produce filtration effect, make the sound effect better. Unique design: the unique noise detection circuit preserves the sound. Eliminate ground loop hum between an audio source and amplifier. Noise Suppressor - Eliminates unwanted noise and hum without altering the tone of car audio. It is the pedal to mute any pedalboard or effects settings. Safe Operation The body element is covered by copper material, which has a high temperature and melt-resistant function. Avoid short circuit of the item. Stay safe in your car. High performance: Able to provide high output current, low harmonic and cross distortion, ensure safe operation, preserve the attack and surround of the sound of an instrument. Color: As Shown Material: plastic Package Contents: 1 x Noise Suppressor