The Dr. Scientist - The Atmosphere is a digital all-in-one reverb machine. Featuring 16 high quality DSP reverb algorithms including Spring, Hall and Plate along with experimental sounds like Aether (reverse), Gated and Pitch. All of the built-in effects are fully customizable via the built-in knobs, expression control, assignable press and hold functions or the 1.8" TFT color screen. Selectable true bypass or trails bypass allows for controlling how the pedal reacts when switching between your wet and dry signal. On-board presets, internal LFO system and MIDI all work together to dial in the perfect reverb and ambient tones. Includes a 9v power supply.