The air freshener dispenser delivers improved aesthetics, performance, and battery cost savings to your facility while providing more flexibility and control over your air-care dispensing. The simplified user interface allows you to customize the dispensing minute intervals: 7.5, 15, or 30 minutes. A light sensor allows flexible programming when needed so you can choose from the following settings: Light, Dark, or both. A removable magnetic lock requires you to open the unit with the included magnetic key to preventing unauthorized access to the fragrance canister. Battery-operated construction requires two AA batteries for up to a year of performance or accepts four AA batteries to provide up to two years of performance. The dispenser is designed for use with compatible metered air fresheners (sold separately).