The Moog MF-102 Ring Modulator is the grandchild of the Moog modular synthesizers. It produces sum and difference frequencies between the audio input and a carrier oscillator. The ring modulator's LFO can be used to modulate the carrier frequency. All parameters are available to be controlled by expression pedal or CV input. Features LFO out, and Carrier In/Out for compatibility with other MoogerFooger pedals, or other CV compatible equipment. Made in the USA.