The wireless two-channel transmitter is suitable for flush mounting and may only be used to control wireless receivers. By using this two-channel transmitter, you can expand the switching function of existing switches or push buttons via a receiver. The two-channel transmitter checks whether a switch/push button is live and transmits the corresponding code (A, B, C or D) to the wireless receiver, which in turn switches the consumer. This wirelesss two-channel transmitter cannot be used in Niko Home Control installations.