Automatic spray air freshener detects movements and adjusts fragrances to deliver a continuous fresh smell. Clever odor-detect technology identifies thousands of odors and adjusts fragrance automatically by providing a burst of freshener. The gadget is smart enough to prevent excessive dispensing. Air freshener returns to the regular setting when you leave the room with scent emissions every 9, 18 or 36 minutes. One fragrance-spray refill lasts 60 days. Air Wick Freshmatic Ultra Odor Detect Starter Kit includes the automatic unit with motion sensor, Cool Linen and White Lilac fragrance spray and three AA batteries. Air freshener is refillable.