This is a one-knob fuzz pedal from "flyingteapot," a Japanese handmade effects pedal brand. This is the #5, an early-run Fuzz Monolith! Red LED Soft-touch footswitch True bypass DC9V center negative Original box and rubber feet included! Manufacturer's description: This unit uses a Motorola 2N5088 transistor in the first stage of the circuit. It has high potential as a traditional fuzz pedal and is very versatile, but the clarity of the lead sound is outstanding! Even when the volume is turned up and played at high volume, it has a strong presence, making it a fuzz pedal that is both unique and highly usable. FLYINGTEAPOT FLYING TEAPOT