Aroma Home Harmony Calm Ultrasonic Diffuser Bring the healing qualities of essential oils into small spaces with this compact ultrasonic diffuser. Perfect for use in smaller rooms, offices or in the car the sleek and simple design fits neatly into any space. Just add a few drops of essential oil to instantly feel the therapeutic benefits and allow the natural aroma to fill your space an 70ml 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 2-3 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.