Movall effect pedals are developed and manufactured by Caline. Accordingly, the manufacturing and sound quality are high. The pedals feature an aluminum housing and are very compact for space-saving placement on a pedalboard. They are powered by a 9V DC power adapter (center negative) which is not included. Size: 9.8 x 5.3 x 3 cm (LxWxH). The Crazy Screamer delivers warm, smooth, and pleasant overdrive sounds reminiscent of an Ibanez TS808 pedal with excellent sustain. In addition to the Drive, Level, and Tone controls, the pedal has a switch for two modes: Warm and Hot. True Bypass.