Panasonic FV-WCD02-W Timer Swtich, WhisperControl Preset Countdown On/Off/Light - White Wall plate included Compliant with ASHRAE 62.2 standards Preset for 10-20-30 or 60 minute intervals Fits single-gang box LED light indicates countdown time elapsed and last LED flashes two minutes until OFF warning Press and hold override timer function; hold down the button you want until LED light indicates it is on