Module A-145-4 is a simple quad LFO. Virtually every system requires a few simple LFOs for modulation purposes. The module contains four simple LFOs with the waveforms triangle and rectangle. A dual colour LED (red = positive / yellow = negative output voltage) indicates the triangle output of each LFO. 50Hz ... 0.04Hz (about 20 seconds, jumper removed) and about 2Hz ... 0.002 (about 8 minutes, jumper installed). Read More Brand new with warranty Video: https://youtu.be/wqWj_LX5SKEProduct Specs Item Number: 13483 Make: Doepfer Model: A-145-4V Condition: Brand New Finish: Black Categories: keyboards-and-synths ⇒ eurorack Function: LFO Quad Made In: Germany MPN: A-145-4V EAN: 4250711114558 Modular Grid: Eurorack ⓘ + Dimensions*: 4 HP 38 mm deep Power*: 30 mA +12V 30 mA -12V ? mA 5V * User contributed details