This is a rare dual-band equalizer pedal from the effects pedal series once made by Pearl, the famous drum manufacturer. Functionality has been confirmed. This is an early production model with a low serial number, #686. Please check the photos for the exterior condition. There is no noticeable crackling, and the lamp functions correctly. It operates on a standard 9V power supply. Pedal-type dual parametric equalizers are quite rare. I don't think there are any others like it even now. It's convenient to use because it's intuitive to operate. This is a hidden gem. The unit itself only; no accessories are included. We will ship quickly via Yu-Packet Plus. Thank you.