Metered aerosol dispenser features spray intervals of 5 to 25 minutes. Features a choice of continuous mode, operating when there is light, or operating in the dark. Accommodates most standard metered aerosols. Green light indicates that the battery is operating, red light indicates that the circuitry is functioning properly. (2) D batteries required, not included. 3-3/4 In. W. x 3-1/4 In. H. x 8-3/4 In. L.