The 1-channel radio set includes a 1-channel transmitter and a 1-channel receiver. This combination allows the radio set to operate in timer or push-button mode. In push-button mode, the receiver output is activated as long as the transmitter button is pressed. In timer mode, the receiver output remains active for a configurable time even after the transmitter button is released. The receiver has both normally closed and normally open contacts available for the output connection. LEDs on the transmitter and receiver provide information about the function and transmission behavior, as well as the status of the power supply. The products in the SH-12 radio series operate with extremely low interference due to their special transmission characteristics. With interference-resistant radio transmission and extremely short response times, very high ranges can be achieved. For strong narrowband interference or the use of multiple parallel radio systems, the operating frequency can be adjusted to individual needs. The SH-12 radio series can be operated in both unidirectional and bidirectional modes. In bidirectional communication, the transmitter automatically adjusts its transmission behavior based on the quality of the radio link.