This collection of Erica Synths module kits will give you a flexible duo phonic synth in your Eurorack modular system. It includes the PCB's (printed circuit boards), printed aluminum panels, and the rare, original Russian IC's and transistors. With an LFO, two VCOs (one with detune, the other with ring modulation), a mixer, dual-mode high-pass low-pass VCF, and VCA, this kit is a substantial addition to your existing Eurorack system, or a comprehensive starter kit for the synth hobbyist.