Designed by the British company called Drayson Technologies, Freevolt can harvest energy from radio waves into small but useful amounts of power for electronic devices such as sensors, wireless device and mobile phones.
Freevolt works by harvesting energy across a wide spectrum of radio bands using its multi-band antenna. The harvested energy then converted to current through the component called rectifier.
I believe this is a fantastic breakthrough in the technology world, a fantastic vision. With the technology advancement, Designer will be able to create a more sophisticated and smaller Freevolt and one day could play a part in helping reducing the total energy consumption used by all human civilization.