Based on the Roland 100M VCO, modified for Euro. Features simultaneous sawtooth, square and triangle outputs as well as both soft and hard sync. PWM from 50/50 to 90/10. Range pot is coarse tuning, Pitch pots is fine tune. You can dial in ultra low frequency oscillations (1 minute 20 seconds!) for use as an LFO, or go right up to supersonic range and beyond (over 100,000kHz)!