Just add tap water and essential oils Extremely quiet and easy to clean Cool steam / no heat involved / no risk of burns Automatically shuts off 2 Timer Settings (1 Hr / 2 Hr) Runs up to 14 hrs intermittent / 7 hrs continuous Rotating LED Lights 1 Year Warranty NOW® Solutions Real Bamboo Ultrasonic Oil Diffuser unites aromatherapy with modern scientific innovation to create an essential oil diffuser that's the perfect complement to your home or office. This attractive diffuser is BPA-free and utilizes high-frequency ultrasonic electrical vibrations to create an ultra-fine mist. This diffusion method doesn't utilize heat, which maintains essential oil integrity and holistic properties. Specifications: Model: 7521 Color: Bamboo wood cover and base Capacity: 150 ml / 5 fl oz Run Time: Up to 14 Hrs Intermittent / 7 Hrs Continuous Features: Timer setting 1 Hr / 2 Hr, int/cont. 3 changing LED lights: Blue, Green & Red Coverage: 400 square feet Rated Power: 12W Adapter Power: 100-240V, 24V 0.5A Wood/Bamboo Bamboo has long been a staple for NOW® – a sustainable plant that can grow to full size in just 3-4 months, compared to trees that can take 30+ years to grow. We use bamboo due to its naturally renewing properties, coupled with its pesticide-free and chemical-free harvesting. NOW Ultrasonic Essential Oil Diffuser Instruction Manual NOW Diffuser Limited Warranty