These hanging oil diffusers are great for the car or at home in the bathroom, laundry room or anywhere you may need a boost of good scent.They are easy to use you just unscrew and remove the plastic plug. When you need more scent you tilt it on its side and rotate for 20 seconds. The oil will soak into the wooden wick lid and the aroma will be given off for 5-8 weeks with the oil in the diffuser.