... and a fixed grayscale output.IR 12 key LED Single color Strip DimmerTechnical Parameters Working ... 1. Supply voltage of this product is DC12V~24V, never connect to others or AC220V. ... LED controller factory, specialized in LED RGB controller, LED single color controller, LED touch controller, LED DMX512 master, LED DMX513 decoder, LED amplifier, LED digital controller, LED dimmer, LED music controller, ...