XR1-Ring Modulator Oscillator

Features:

For instrument or microphone
Low noise preamp
Coarse and fine frequency tuning
Envelope follower and LFO for frequency modulation
External frequency control by pedal or CV (1V/oct adjustable)
Footswitch input (true bypass)
Battery operative (battery lifetime ≈7-10h)
Handmade steel casing

http://www.cg-products.de/xr1-e/