NRG LightMaster 2000 3-Light Wireless Remote Control System for "On/Off" Control.

The Lightmaster 2000 is a wireless command system that allows you total control over any number of AC lights from up to 150 feet away, even through walls. Never again trek across a crowded dance floor, disrupt a news conference, or spend time taping down cables. Simply plug any AC light (up to 1,000 watts) into a control module and you're in total control using a tiny handheld radio frequency transmitter. Since you can add an unlimited number of control modules the Lightmaster can be expanded as your lighting needs grow. Lightmaster modules can be easily set to a unique address to avoid interaction in crowded environments where other Lightmasters may be in use.