No mess - Easy to use. Adjustable control dial. Made in Mexico.
Directions: 1. Slide clip onto back of unit until it snaps into place. 2. To activate, pull silver tab and throw away cover. 3. Clip unit onto vehicle's vent blades. Not between blades. 4. Adjust fragrance level as desired by rotating plastic bezel. 5. Air flow through vent is required for fragrance release. 6. When liquid is gone, replace entire Vent Fresh with a new unit. 7. Fragrance oil and liquid could damage or stain some surfaces. If spilled, clean immediately.
WARNING: California Residents - Proposition 65