ISP TECHNOLOGIES DECI-MATE MICRO DECIMATOR PEDAL. This pedal reduces unwanted noise from electric guitars. I think the sound attenuation during noise reduction feels natural. Please note that Velcro is attached to the back. Thank you. Below are the product specifications. ■ Guitar Effects Pedal ■ Noise Reduction ■ Features ・The effect of the DECIMATOR, which removes noise with extreme power, is realized in a mini pedal. ・True Bypass ■ Specifications Power Input: 9VDC 40mA Center Negative *Adapter sold separately