"Using the latest in microwave energy transmission technology, the Wireless Extension Cords (WECs) 'beam' power right where you need it. Broadcasting in the 7.2GHz range, the WECs will not interfere with wireless networks, phones, or Bluetooth components. Be sure to heed all the warnings in the instruction manual; the microwaves used are relatively safe, but you don't want to cook your computer (or coworkers) by mistake." ThinkGeek is also owned by OSTG.