JHS Prestige Buffer/Booster with JHS Sticker! 0-25% acts as a transparent buffer, making up for the loss of high-frequencies from long cable runs 25-50% adds a noticeable tone/gain boost, perfect for solos or preloading overdrive effects 50-100% kicks in clean drive, easily pushing tube preamplifiers beyond the breakup point A direct descendant of the long-discontinued Mr Magic pedal An amazing pedal that combines a high-headroom buffer and clean boost