Metered Air Freshener Dispenser is automatic & wall-mountable for optimal convenience. Easy-to-use, slim, compact dispenser provides reliable, consistent sprays to meet your odor-elimination needs. Time set switch located inside the dispenser housing allows you to adjust the frequency of sprays by intervals of 7.5, 15 or 30 minutes. Set the metered spray for 24 hours, night or day modes. Red light alerts you when your refill may be empty & needs to be replaced. Dispenser runs on two C batteries (not included). Dispenser works with Claire Metered Air Fresheners (not included).