Get the freshness you want only when you need it with the first air freshener with a motion sensor. The innovative glade sense and spray automatic freshener smart unit automatically detects motion and releases a concentrated burst of fresh fragrance. The unit will then go into a lock-out mode for 30 minutes. You can customize your fragrance level at any time by pushing the boost button for an extra burst, even if your unit is in lock-out mode. Refills last for up to 30 days. Great for bathrooms.