In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .
Q: In the near future you'll be able to ditch your charger and power your devices using 'thin air'. Engineers have developed technology that turns radio frequency (RF) energy into power for wearable and gadgets around your home. Called Freevolt, it transforms energy in the signals created by TV, Wi-Fi and mobile networks into a current that can be 'harvested' by compatible devices. Freevolt, and its Perpetual Power technology, was developed by Lord Paul Drayson from London-based Drayson Technologies with support from Imperial College London. The concept behind the technology isn't new and similar systems have been created at the University of Washington, for example, but Lord Drayson believes his technology takes it a step further.Freevolt was developed by Lord Paul Drayson at Drayson TechnologiesIt harvests radio frequency energy from Wi-Fi, TV and mobile networksThis energy is converted into power and can be used to charge devicesThe technology is being used in a portable air pollution sensor for phones
A: 
Specifically, the team reuse existing Wi-_ infrastructure to provide connectivity to these low-power devices.