Big D remains on the cutting edge of technology with this state of the art metered aerosol dispenser. The fully programmable unit permits customized start & stop options. The LED clock is set to 24-hour military time to ensure accuracy. May be programmed for either 5 or 7 day service. Spray intervals may be set from 1 to 60 per hour, allowing more controlled use of the product. Covers up to 6,000 cubic feet.