Super Large Capacity and Longer Running Time. 1500ml almost 1/2 gallon water capacity of Exqline large essential oil diffuser supports overnight operation with a full tank of water up to 10 to 20 hours working time. No need to fill water as often as using other smaller capacity essential oil diffusers. Effortless Usage and Switchable Lighting Mode. This large diffuser for essential oils is easy to use. Inject water then add a few drops of your favorite essential oils to the reservoir and the room will be filled with fabulous aroma. The lights options are separately switchable between bright and dim providing you a cozy atmosphere in rooms with soft lighting. Adjustable Vapor and Whisper Quiet Operation. Vapor comes out from side of the lid on the top actualizing oriented diffusion. Knob with 270 degree rotation to set humidity level. With the help of advanced ultrasonic technology the large room diffuser produces less than 35 dB of noise perfect for your baby to have a disturbance free sleep at night. Ultrasonic Mist and Roomy Working Range. Ultrasonic diffusion does not utilize heat which allows Exqline large capacity essential oil diffuser to maintain essential oil integrity and holistic properties well. It is designed to humidify the air in rooms up to 325 sq ft and aromatherapy scent coverage area is 450 sq ft. Lifetime Customer Service. Our large room essential oil diffuser comes with a 1 year warranty as well as lifetime customer service. To save money by purchasing more Exqline large oil diffuser please kindly check the promotions on product page. If you have any question please feel free to contact us.