Check the listing for details. Red Panda Radius Ring Modulator/Frequency Shifter Pedal. Condition: New. Listed at 349.00 USD. Iconic Ring Modulation for the Modern Player Today’s guitar players and synthesists have more sonic options than ever before. Now, the Red Panda Radius ring modulator/frequency shifter pedal offers an updated take on the classic synthesizer effect. This pedal has a new “eight-quadrant multiplier” algorithm that enables the pedal to provide ring modulation that seamlessly transitions to frequency shifting as you go. Pair the eight-quadrant multiplication with spot-on tracking and the versatile LFO, and you’ve got a recipe for sonic success. The Radius offers four onboard preset slots with a total of 100 recallable presets via USB MIDI control. And, because it can handle both line- and instrument-level sources, the Radius can handle guitar, bass, synths, stage pianos, and more.