Don't let your car be the only thing that's dry. Upgrade your ride with the irresistible scent of XXX Warrior's Oud Cologne Pheromone Infused Air Freshener. You'll be the talk of the town, and your car will thank you for it. How to Use: Remove Vent Stick from package. lnsert plastic clip into hole on back of vent Stick Position clip orientation to horizontal or vertical alignment to fit vent as desired. Keep unused Vent Sticks in package until needed. Avoid placing air freshener on vinyl, carpet leather or varnished surfaces