Replace a standard wall switch with a countdown timer to ensure exhaust fans or lights are not left on unintentionally|Four preset time option buttons 10-20-30-60 min with separate off button|Press time option to turn on and will automatically turn off when time expires|Shallow design easily fits in the wallbox and lead terminal wires for easier installation without having to bend wires around terminal screws|Innovative Green Flex Sleeve wires to ground in homes with no neutral wiring or remove the sleeve and connect to a neutral wire if present in the wallbox, a ground wire is required for installation|DIY friendly with two black wires that can be interchanged between line and load to help prevent miswiring|Zero Cross turn-on technology to extend the life of the switch|Manual override keeps load on for 24 hr|Override can be disabled by pressing one of the timer option buttons or off button|Change color with DTKIT faceplates available in white, ivory, light almond, gray, black and brown|Do not use to control lights if there is no other light source in the space