Tips: not include essential oil Package included: 2 *Car Air Freshener Clips 12* unscented Stick Easy to use: Just drop your favorite essential oil on the unscented stick and load it into the aroma diffuser, then you just clip the car diffuser on the car's vents Notes: The diffusion effect depends on the temperature, the diffusion of the essential oil itself, and the persistence of the fragrance of the essential oil. [More Choice] According to different scent preferences, our car diffuser vent clip has included 12 UNSCENTED refill sticks that absorb and dispense any desired essential oil or perfume with longer lasting fragrance allowing you more aroma choice over your vehicle’s fragrance. Please Note: This product does NOT CONTAIN ANY ESSENTIAL OILS, the cotton swabs that come with it are unscented cotton swabs, and buyers need to bring their own essential oils to use with it. [Unique Rotating Design] The top and bottom of our car clips have different sizes of diffuser hole, you can rotate the white dot-marked end to control the concentration of aromatherapy. When you want a faint scent, you can turn off the diffusion port of car air freshener. [Great Gift] This car accessories new car diffuser vent clip packaged with a exquisite box you a nice gift for your family and friends at any occasion.