Slim-line, high-impact, chemical-resistant plastic cabinet activates metered refill every 15 minutes, 24 hours a day, for 30 days. Operates one year on two C batteries (not incl.). Mounting screws included. Manufacturer's five-year warranty when used with TimeMist® refills (sold separately). 33⁄4w x 31⁄4d x 91⁄2h.