Lutron MA-T51-BL Maestro Countdown Timer, Black
The Maestro Countdown Timer is an ideal control for both exhaust fans and lights. Set the timer to operate a fan or light for 5-60 minutes before turning off automatically. Softly lit orange LEDs  indicate the time remaining before turn-off. Use the Maestro Countdown Timer with exhaust fans in bathrooms to eliminate moisture and reduce mold and mildew growth. Never forget to turn off your fan off again, or make unnecessary trips back to the room. Use it in the garage to keep the light on as you get into your vehicle and it will turn off automatically after you leave.  Save energy by using in closets, attics, basements, and other low-traffic areas to ensure the light is never left on for a long time.