This is a classic model from MASF, a brand renowned for its noise and special effects pedals. I purchased this used and have been using it for a while, so there are some scratches and signs of use. Please refrain from purchasing if you are concerned about these. The following is a quote from the retailer's description: Glitch/Hold effect pedal designed for extreme guitar playing. RAPTIO is a glitch/hold effect pedal designed for extreme guitar playing. You can switch between Glitch and Hold modes with the toggle switch. Glitch mode produces a tricky glitch delay sound, while Hold mode sustains the sound while mixing in a sound delayed by 1mSec to 10mSec. Wet Volume controls the volume of the effect sound, and Dry Volume controls the volume of the original sound. Rate Control changes the repetition speed in Glitch mode and the delay speed of the mix in Hold mode. The footswitch is a momentary type, so the effect is only on while it is pressed. In both Glitch and Hold modes, the sound will never decay while the footswitch is pressed.