Our superior Car Air Freshener Fragrance Diffuser uses the highest-quality undiluted oils for a lasting, delectable scent in your vehicle. To activate, simply remove the cap and stopper, flip the cap upside down 2-3 times, cover with the wooden decorative cap, and replace the stopper. This diffuser should last up to three months, possibly 6, depending on conditions and how often it is flipped. To ensure safe usage, keep away from plastic, clean up any spills, and wash hands afterwards. Secure in place with a vent clip to prevent spillage and hold it next to the fan. With a variety of luscious scents to choose from, we guarantee you'll love it.