The Chaos Nand Synth is a great simple (yet powerful synth) to use in multiple applications, simple and super fun. The Nand synth offers 4 square wave outputs that modulate each other. There is a voltage input which works with some sequencers (ie. our Magic 8 Step), that allows the CV output to change the pitch of the Nand Synth.  Also this input can but used by a Trigger on your sequencer and some drum machines to make this a great noise-drum device.  Takes a 9V CENTER NEGATIVE power adapter. MADE IN THE USA. check out the demo: