Spray timer adjusts to release aerosol at 5, 10, 15 or 20-minute interval. 24-hour/day (light sensing) modes of operation. Wall mount is easy to refill. Longer-lasting battery life. Mount the Dispenser unit on the wall at the recommended height of 6.5-8.2 ft (2-2.5 mts) from finished floor. The dispenser should be placed where it is 9.8ft (3m) away in any direction from any direct heat source, open flame, or any open food or beverage product.