In the words of Walrus Audio:

The R1 is an extremely powerful and
versatile multi-function reverb that can quickly go from small intimate
room sounds to massive washes of experimental euphoria with six
customized, studio-quality programs – Spring, Hall, Plate, BFR, RFRCT
(Refract), and Air. Every program can be tuned and tweaked and then
saved to one of nine on-board presets. The R1 boasts a volume swell
effect that can be applied to any program, sustain and latching
momentary features, stereo in and out, MIDI control, and up to nine
on-board presets (128 via MIDI). Players of all styles and genres will
be able to find eternal inspiration with the R1.