BETTER SOUND - Improve radio signal and reduce noise. The copper signal wire, strong anti-interference, produce filtration effect, make the sound effect better. design: the noise detection circuit preserves the sound. ground loop between an audio source and amplifier. Noise Suppressor - Eliminates unwanted noise and 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- function. Avoid short circuit of the item. Stay safe in your car. High performance: to provide high output current, low harmonic and distortion, safe operation, preserve the attack and surround of the sound of an instrument. Color: As Shown Material: plastic Package Contents: 1 x Noise Suppressor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.