Cat, Diffuser Car Vent Clip. Add your favorite essential oils for a wonderful aromatherapy scent. Opens like a locket with reusable felt pads. Strong magnetic closure and strong vent clip. Essential oils and aromatherapy have become so popular because of they have been known to help with Calming, ADHD, Sleep, Energy, Immune boosting, healing and much more. Choose your favorite scent and because the felt pads are easily changeable you can change scent with mood at any time . Depending on your mood and choice of oils enjoy the beautiful aromas you love.