Big-D Metered Dispenser,Battery Operated,w/ 24 LED Clock,SKGY State of the art, fully programmable, metered aerosol dispenser permits customized start and stop options. Made of ABS plastic. LED clock is programmable for five or seven-day service. Spray intervals may be set from 1 to 60 per hour, allowing more controlled use of the product. Counter shows number of spray activations. Wall-mounts with adhesive backing and/or included screws. Requires two D cell batteries (sold separately). Covers up to 6,000 cubic feet. For use with Big D 462, 463, 464, 472, 473 and 475 and most other metered aerosols.