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. Simplified user interface allows you to customize the dispensing minute intervals: 7.5, 15 or 30 minutes. Light sensor allows flexible programing when needed so you can choose from the following settings: Light, Dark or both. Removable magnetic lock requires you to open the unit with the included magnetic key to prevent 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. Dispenser is designed for use with compatible TimeMist metered air fresheners (sold separately).