10 SCENTED STICKS INCLUDED: Vent Scent 2 Pack comes with 10 scented sticks total. 2 sticks of each of these 5 scents, choose from Vanilla, Apple, Lemon, Lavender and Ocean. LASTS TO YOUR LIKING: Replace the passive diffuser scented sticks to extend smell or stop it to try a different scent. ZONING: Choose the whole area, room, or level of the home you'd like the freshener & place it on the nearest HVAC vent register. EASY INSTALL: Simply slide on a vent in the house you'd like the scent. No hassle of furnace filter openings. ADJUSTABLE STRENGTH: Twist the device to adjust air flow to the scent. Support Small Business: Vent Scent is an American Owned and Operated Company.