The SHT-12 BS remote control allows for the remote operation of up to 4 functions of a radio module or receiver from the SH-12 radio series. A blue LED indicates the transmission operation and provides information about the quality of the radio communication as well as the transmitter's supply voltage. The red LED shows, depending on the wiring at the radio receiver, either the status of the receiver's supply voltage or the input of the receiver confirmation. An integrated buzzer also acoustically signals the confirmation from the receiver. If the confirmation is disabled, every change in the button state is reported instead. With the profile seal, impact protection, and a special keypad foil, the remote control is very well protected against mechanical impacts and moisture, making it suitable for use in harsh and humid environments. The remote controls of 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, ranges of over 1000 meters 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 to the quality of the radio link. The transmitters are factory-programmed with a continuous serial number, which enhances security and makes each transmitter a uniquely distinguishable item.