1 Each. Metered aerosol dispenser features an attractive design to complement virtually any setting. LED light changes color to display the current battery level to prevent unexpected power depletion. Spray intervals can be adjusted between various intervals for a customizable level of fragrance. Plus, working time mode options let you set the dispenser to spray during the day, night or continuously. Dispenser requires two D batteries and accommodates most standard metered aerosols cans (sold separately).