Aroma Home Harmony Purity Ultrasonic Diffuser Add a touch of serenity to your home with our Purity Ultrasonic Diffuser, the simplistic design f this diffuser has a spa like feel and sits discreetly within any space. Use on its own as a humidifier or with a few drops of essential oil for a wellbeing boost that will leave a natural fragrance in the home. This diffuser has an 250ml Water Capacity USB Connection cable. How to use: 1. Place diffuser on an even surface. 2. Turn the outer cover and remove it from the diffuser base. 3. Open the water tank cover and fill with water. 4. Add 6-8 drops of 100% pure essential oil into the water. 5. Replace the water tank cover and then place the outer cover back onto the diffuser base. 6. Connect USB cable to a computer or suitable 5V power adaptor 7. Use buttons on the front of the diffuser to set required mist/colour options.