Echoflex solutions, a manufacturer and distributor of lighting and HVAC control solutions introduced self-powered wireless switches and sensors. Using the Enocean technology (a spin-off of Siemens AG), these switches and sensors provide the solution to wireless controls. The Enocean technology generates energy derived from the environment and has a range of about 100 feet. When the wall switch is pressed, a piezoelectric crystal provides the power to send a signal to remote fixtures. Other environmentally derived methods include solar and electrodynamics.