The R7 X2 Reverb combines MOOER's best digital effects algorithms from the A7 Ambiance and R7 Reverb pedals and combines 14 different types of high-quality stereo reverb into one ultimate pedal. Parameter knobs include High Cut, Low Cut, and Mix for adjusting the EQ and Decay and Pre-Delay knobs for adjusting the intensity of each effect. Unique features of the R7 X2 include the Infinite and Trail-on functions to customize how each effect fades out. Here's Nick Jennison with the full review