This standard unit is ideal for use With Insecticide or by service company. It Features: a 15-minute spray interval setting, Empty can reminder (3,000 sprays), Low battery monitor and operation indicator. With push button design for easy On/Off. With chemical resistance plastics. Operates on two D-cell Alkaline batteries. Design to fit With almost all-standard metered aerosol cans. One unit recommended for a room area of 6,000 cubic feet. Batteries not included.