The radio transmitter SHT-12 FS enables the remote control of up to 4 functions of a radio module or receiver of the radio series SH-12.With the new hard transmittor SHT-12 FS are switching signals of relay contacts, buttons or switches without any installation effort for control lines. It has 4 inputs for floating contacts. For each of the 4 inputs, the operating mode of scan or switching signal transmission can be set.With the momentary signal transmission corresponds to the end of the contact duration, the transmission path remains while the signal is present, occupies. With the switch signal transmission is only a state changes to the input a radio signal transfer and thus, the radio link is not permanently blocked.A blue LED indicates the transmission is in operation. It is not only sent radio signals, but also gives information about the quality of the radio communication and the transmitter power supply. The red LED displays, depending on the wiring on the radio receiver either