Boss SD-1-4A Overdrive; Effects Pedal for Electric Guitar; Limited Edition 40th Anniversary SD-1 Super Overdrive; This commemorative pedal features a black body with yellow lettering, gold-capped knobs, and a vintage silver thumbscrew forthe battery compartment; it comes in a box with a special 40th anniversary logo; Controls: Drive, Tone, Level; Push Buttons: ; LED: Effect On; Display: ; Footswitches: Effect Bypass; Connections: Input (1/4" Jack), Output (1/4" Jack); Power Supply connector: Barrel Connector 5.5 x 2.1 mm, center negative; Current Draw: 10 mA; powered by a 9 V Battery or a 9 V DC Power Supply (not included)