The AD HOC Electronics Wireless Handheld Remote Control Switch is a battery-free wireless remote that fits in the palm of your hand. Has two transmitters that send wireless signals to EnOcean relay receivers. When paired with an RF relay (non-dimming) receiver or a plug-in dimmer receiver, each sold separately, tt is the perfect solution for controlling lights and appliances form the comfort of your couch or bed. The remote can programmed to a receiver through a simple single-button configuration procedure. The remote is powered by EnOcean technology that converts the press of the switch into a small amount of electricity. This electricity is used to transmit a radio frequency (RF) wireless signal that communicates with the relay receiver. Add more relay receivers and control an unlimited numbers of lights with the press of a single button. With an RF wireless range of nearly 100 feet, AD HOC transmitters and receivers allows you to add lighting control from almost anywhere in you home.