Product Details Slide the refill into the case before attaching to the air conditioning vent in your car. The Car Diffuser utilises the natural air flow in the vehicle to release fragrance but for more active diffusion, use it in conjunction with your cars air conditioning. If youre not planning on using the car for a while, place the refill back into the heat seal to keep the fragrance fresh. Each scent refill lasts approximately 3 months when opened and up to 18 months unopened How To Use WARNING Please be aware that safety information may change or vary from time to time. Please refer to the safety information on the product package you receive for the most up-to-date information. May cause an allergic skin reaction. Harmful to aquatic life with long lasting effects. Keep out of reach of children. If on skin, wash with soap and water. If skin irritation occurs, get medical attention. Dispose in accordance with local regulations.;; Size & Fit Lime Basil & Mandarin Car Diff Full Ing