... the batteries have low power, a battery diagram will appear on the LCD screen SpecificationsThe dispenser can be set to spray ... ,15,22.5 minutes,1 hour,2 hours,3 hours . The air freshener refill can spray 3,000 times.1) The dispenser can be ... ,22.5 minutes,1 hour,2 hours,3 hours .2) The air freshener refill can spray 3,000 times3) Apply standard steel can as ...