Control a light from 2 switches without new wiring. - Features: Remote Control/Switch-easy install mounts anywhere, without wires. Powered by a 9 volt alkaline battery (not included). Battery typically lasts 1 year. - Receiver switch-easily replaces your existing wall switch. - Up to 100 Foot Transmission Range- Signal passes through doors, walls and floor. - Different Channels Available-compatible with other Heath/Zenith switches (same channel code). - 500 Watts Maximum- Control up to 500 watts of incandescent lighting. - Operates like a 3-way switch. - Trilingual Manual-Manual includes English, French and Spanish instructions. - Ideal locations include: Long hallways; large rooms with two entryways; top and bottom of stairs; detached garages. Anywhere you need two switches to control the same light.