Week 1 - Works every 10 Minutes for 10 Seconds, Week 2 - Works every 10 Minutes for 2 Minutes, Week 3 - Works every 10 minutes for 6 minutes, Week 4 - works all the time, On day 30, LEDs go RED to remind you to change the air freshener cover, On day 33 - an audible reminder will sound if cover not changed.
