Car Fragrance Diffusers hang from the rear view mirror and release scent whenever turned upside down. Directions for use: 1. Unscrew wooden top and remove plastic stopper. 2. Screw wooden lid back on securely 3. Turn upside down to release fragrance for 2-3 seconds. The wooden top will become saturated with oil. 4. Turn bottle upright and hang to enjoy! If you spill any oil wipe away immediately with a cloth.