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 included). Mounting screws included. Manufacturer’s five-year warranty when used with TimeMist refills (sold separately). 3-3/4w x 3-1/4d x 9-1/2h.