NXG NX-RM820 20-Device IR/RF PC Programmable Remote Control Radio frequency (RF) operation provides 100' range though walls and doors when used with optional NX-RF200 RF addressing permits operation of up to 15 different equipment locations throughout the house when used with optional NX-RF200 RF Routing allows for independent control over an array of identical components when used with optional NX-RF200 20 different components can be programmed with up to 4 pages of LCD screens and 33 buttons each Windows-based PC software contains over 1,500 different brand/model code sets and enables custom program design