SkylinkHome LK-318-3 Wireless Three Button Keychain Remote Control | Simple Easy To Use Handheld Home Automation Transmitter SImple, small, hand-held and easy to use local 3-Button keychain remote control (For replacement or addition to your SkylinkHome Wireless Home Control System) Works with SkylinkHome Receivers to create wireless remote home control applications (sold separately) Remote provides convenient wireless control of lighting, small appliances, home electronics including security lights, holiday lighting and decoration displays. A long life CR-2032 battery comes conveniently pre-installed. Operation range up to 500ft in an open area even through walls and floors.