WREL enables transfer of large amounts of power (up to 50W) over medium distances (1m, depending on coil size). Our key contribution is the development of adaptive tuning techniques that enable high efficiency power transfer, even as transmit-receive range, orientation, or load vary. With most wireless power systems, the farther the receiver is from the transmitter, the less power can be transferred. The WREL system has a "magic regime" in which efficiency does not fall with distance. We are currently working to power implanted medical devices using these techniques. Find out more about the FREE-D system, our wirelessly powered heart pump.