Electrotechnical and electronic apparatus, equipment and instruments, namely, apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; physical and optical apparatus, electrotechnical and electronic equipment and instruments, namely, electronic radio switches, electronic radio sensors and electronic radio actuators, optical sensors, piezo-electric sensor, electronic sensor for temperature, position, air humidity, gas concentration, occupancy status, light level, switch information, metering information, water leakage, smoke detection and optical transmitters, transceivers for radio systems, repeaters for radio systems, radio receivers, radio transmitters, sensor transmitting modules, transceiver modules for radio systems, repeater modules for radio systems, receiver modules for radio systems, piezo-electric transmitter modules, evaluation boards for receiver modules and transmitter modules, electric valve actuators; weighing, signaling, measuring, metering, registering, monitoring, testing, controlling and switching apparatus, in particular, electric and electronic radio switches, sensors and actuators; all of the aforesaid goods being solely for the field of switches and radio sensor technology and energy conversion and not being for telephone servers, telephone switches and protocol converters