Wooden diffusers are a clean alternative to traditional car air fresheners. You can use it with any scent you like, oils last longer than alcohol-based scents. You can use this diffuser on indoor fans, car vents, or any space you're looking to freshen. Approximate dimensions: 2.75x2.1” This diffuser is laser engraved and cut for indoor use. Each diffuser has a suede or leather cord and metal clip to hang from your car air vent. Each one is unique, which may cause the design darkness/lightness to slightly vary. To rescent, drop your desired amount of essential/fragrance oils on the back. Each diffuser comes with a mini bottle of lemon eucalyptus oil. **clip is metal and may scratch or mar surface of vent- we are not responsible for any scratches, marks or damage**