Two Mist Modes&Light ModesThe portable mini humidifier has two mist modes.Press the button once to continuously spray for 12 hours, and press the button twice to intermittently spray for 18 hours (stop for 2s).Long press the button for the first time to turn on the LED night light; Press the button a second time to switch the LED night light to the breathing light.You can choose the mode according to your needs.Very easy to operate and great help in moisturizing the dry air for longer time. Ultrasonic Quite Operation&The Best Choice- Less than 30 dB quiet atmosphere can create a quieter sleeping environment. Humidify your living space to prevent dry, stuffy air and flu/cold germs infecting your loved ones.the whisper quiet humidifiers purifier provide fresh and clean air,moisturize the dry skin, improve skin dry peeling.It can keeps your living space clean and properly moisturized,you can enjoy moisturize environment leisurely,Ideal for bedroom, living room, office, spa, Yoga. 500ml Large Capacity & Powered by USB & Waterless Auto-Off- The air humidifier diffuser with tank capacity is 500ml, up to 12-18 hours working time. The cool mist humidifierscan be powered by USB cable. No AC Adapter in box. The USB cable is included, interface of computer, laptop, power bank.When the water level of the water tank is lower than the water level probe in the water tank, all spray modes will be automatically turned off.dry burning prevention ensures use safety to you. Important NoteDo not use essential oils,perfume, distilled water, which will cause the cotton swab to clog and the humidifier to be unusable. If the humidifier can not spray when you use it at first time, please add full water then put it upside down in 5 sec to let it faster absorb enough water or soak the cotton. Worry-Free PurchaseLelestar's products are guaranteed for 24 months, providing worry-free refund or new replacements, so feel free to buy. If you have any questions or are not satisfied with the humidifier after purchasing the product, please contact us, we will reply you within 24 hours to help you. Why Choose New Ultrasonic Humidifier ? 1.Two Spray Modes:continuously spray and intermittently spray free modes exchange. continuous lasts for 12 hours, and intermittent lasts for 18 hours. 2.Night Light Function:There are two modes of night light function, constant light mode & breathing light mode, you can adjust according to your favorite. 3.Automatic Power Failure:When the water level of the water tank is lower than the water level probe in the water tank, all spray modes will be automatically turned off to eliminate safety hazards. 4. Office:adds clean and healthy moisture to office, creates a peaceful working environment to to help you stay focused, which increases efficiency. 5. Bedroom:cool mist humidifier helps to relieve dry, itchy skin by ensuring your home remains the humidity level between 40%~60%. 6. Nursery: Perfect for baby nursery. Provides cool mist without excess noise. helps your baby get a more restful sleep. Specification: Model: CXZ-J623 Voltage: DC5V Power: 1.5-2 watts Material: ABS + silicone + PC + metal + electrical components Water Tank: 500 ml Amount of fog: 30-50 ml / hour Working time: 12-18 hours Noise Level: 36dB Size: 95 * 95 * 129mm Weight: 239g Package Included: 1x Cool Mist Ultrasonic Air Humidifier 1x USB Cable 1x User Manual Warm Tips: 1. Please do not add any essential oils into the humidifier. 2.Please make sure the cotton core has soaked a few minutes before you turning it on. 3. Please do not place this product on blankets or towels. 4.We recommend to clean the tank thoroughly once every 3 days. otherwise scale and dust will grow. 5.If long time don't use, please empty the water in the water tank to prolong the product life.