Just select one of its 99 top-quality preset effects and you're ready to go. The three most critical parameters for all effect programs are adjustable via rotary panel controls. When you create a sound, press the Store button to register it in the REV100 memory.
The REV100 actually has stereo inputs and outputs.
16-bit A/C and D/A converters and a 44.1 kHz sampling rate. The result is full 20 Hz to 20 kHz frequency response with exceptionally low noise and distortion.
You can select effect programs via MIDI rather than the panel controls. You can also use MIDI control change commands to actually change effect parameters.
The LEDs make it easy to set the optimum level.