Essence One DiffuserThis attractive white and bamboo colored essential oil diffuser holds 300 ml of water, has the option of 7 different colored lights and shuts off automatically when it runs out of water. It runs for approximately 6 8 hours and can be set for 60, 120 or 180 minutes. It also has two different mist output settings high and low. All you have to do is fill it to the water line with water and drop in 4 10 drops of your favorite essential oil blend. Relax