9 Electrotechnical and electronic devices for harvesting mechanical energy, energy conversion, and energy generation, namely, power sources for sensors and actuators for pollutants, heat, motion, location detection, communication, pressure and electricity, vibration sensors, vibration meters, radio receivers, radio transmitters, piezo electric sensors, piezo electric actuators, and optical transmitters; weighing, signaling, measuring, counting, recording, monitoring, testing, and open- and closed-loop control and switching devices, namely, radio-controlled switches, electric sensors and electric actuators for pollutants, location detection, communication, heat, motion, pressure and electricity