The Glade Sense & Spray Garden Twist Automatic Spray is the perfect refill for when your Sense & Spray unit is ready for a new scent! Just one spray of the Glade Sense & Spray Automatic Spray Garden Twist & you'll be surrounded in luxury! The refill will fragrance your home for up to 30 days, or 340 sprays. Using clever motion sensor technology (sleep mode), the aromas are only released when you are there to enjoy them, & during lockout time, you can press the 'boost' button for an instant burst of freshness! Please note, the unit is sold separately. To release the fragrance, push the cartridge into the bracket until it clicks into place. Try placing one by your front door, for a welcoming scent the moment you come home! Pack contains one cartridge. Warning: Extremely flammable. Harmful to aquatic life with long lasting effects. Keep out of reach of children.