The Heath Zenith Add-a-Switch wireless wall switch allows you to add a wall switch anywhere you"d like. Just add the Add-a-Switch to the included Heath-Zenith Wireless Command Wall Switch and you can control the light wirelessly without the need for an electrician or difficult install. Also adds dimming functionality to any light. Simply stick the add-a-switch wherever you"d like, replace the existing light switch you"d like to control, pair with the add-a-switch and go. Popular uses include adding a light switch next to your nightstand in the bedroom so you can control lights without getting out of bed. Add a switch wherever existing switches are inconvenient or out of reach. Includes an CR2032 battery. The Add-a-Switch carries a 2 year warranty, excluding battery. White finish. Controls incandescent lighting only.