The Best Selling Wood look Ultrasonic Diffuser is the perfect way to naturally fragrance your home or office. Simply add water and a few drops of essential oil to the tank, and allow your mind and body to be soothed by our Vasse Virgin range of Essential Oils. This ultrasonic model has a 300mL water tank which will allow the unit to run for up to 8 hours continuously. The Wood look also features an array of ambient lighting settings to match any style of decor.