With each data packet the four digital input states and an analog value are transmitted between GND and VCC. Deactivating a digital input causes an off signal to be sent to the receiver, which then switches off the corresponding output. The modular and compact design with pins in 2.54mm pitch allows flexible use in a wide variety of applications.Outputs, e.g. for controlling LEDs and a piezo disk, provide information about the function and transmission behavior and indicate the status of the power supply at the transmitter module and receiver. Another output gives information about the quality of the radio link. For applications that require a particularly low current consumption, the VCC hold output can be used with appropriate wiring to interrupt the supply voltage. The radio transmitters of the SH-12 radio series operate extremely low interference due to their special transmission characteristics. With the interference-insensitive radio transmission with extremely short response times, ranges of over 1000m can be achieved.For strong narrow-band interference or the use of several parallel radio systems, the operating frequency can be adjusted for individual needs. The SH-12 radio series can be operated both unidirectionally and bidirectionally. In bidirectional communication, the transmitter automatically adapts its transmission behavior to the quality of the radio link. The transmitters are programmed ex works with a consecutive serial number. This ensures greater security and makes each transmitter a clearly distinguishable unique specimen.