Monitors, testers, and systems used for measuring and/or recording and/or transmitting data, namely, rectennas, air-flow monitors, temperature monitors, stress factor and vibration monitors, all used in buildings; air quality monitors, namely, a wireless system for measuring air pollution levels comprised of a wearable air pollution monitor that records and retains air pollution data, and software that enables the monitor to communicate such data to a smartphone, all for personal, not industrial, use and to be advertised and sold in channels for the general consuming public; a wireless system for measuring air pollution levels comprised of a wearable air pollution monitor that records and retains pollution data and software that enables the monitor to communicate such data to a smartphone, all for personal, not industrial, use which will be advertised and sold in channels to the general consuming public; computer software for measuring air pollution for personal, not industrial, use and to be advertised and sold in channels to the general consuming public; computer software for measuring the presence of electro-magnetic radiation and converting same into electricity; data processing equipment, namely, data processors, central processing units for processing information, data, sound or images