Knoll engineers have been hard at work making infrared repeater and extender products since 1988. Infrared repeater systems "relay" infrared signals, such as are used by remote controls, broadcast in remote rooms or areas to electronic components that respond to these infrared commands. This Knoll Single-Component IR emitter has both low and medium output in the same unit and a 6-ft wire with stiff forming to ease installation.KNLIR31. IR31. Knoll Systems KNOLL SYSTEMS IR31 Single-Component IR Emitter (Single).