Overdrive effect pedal for guitars that features original 4558 op amps and MA150 distortion diodes, and delivers the classic, authentic vintage vacuum tube-like sound. It provides dedicated Drive, Tone and Level, High/Low and Gain controls, blue status LED for effect on/off and battery check and top-quality on/off switch that maintains incredible signal integrity in bypass mode. Powered by a 9 V battery or adapter (not included). Dimensions: 70 x 54 x 123 mm. Weight: 330 g.