Quiet ultrasound The humidifier runs very quietly, namely less than 20 dB. Never let bubbles and motor noises bother you. You can enjoy a quiet time while sleeping, working or driving. Stay healthy Humidifier delivers cool mist to remove static electricity and dust in the air. Appropriate humidity helps relieve nervous tension, relieve fatigue, quickly penetrate the underlying skin, and soothe dry skin and eyes. Two working modes and light modes You can easily switch between the permanent fog / intermittent fog or switch on the LED night light / breathing light according to your needs. The humidifier switches off automatically if there is a lack of water. 500ml capacity, 10-15 hours of continuous use. Wide use Ideal for various environments, e.g. bedroom, nursery, office, spa, yoga, no worry about your baby's sleep quality when you are in the dark. It can also serve as a desktop decoration to create a cozy and comfortable atmosphere. Powered by USB The humidifiers can be powered by a USB cable. No adapter included, USB cable included, with interface from computer, laptop, power bank can be used. NOTES: To purchase a replacement filter Ultrasonic Quiet: The cool mist humidifier works hard to provide you with a calm and comfortable sleeping environment. A humidifier improves the moisture and health of your skin during the dry season. The cold mist humidifier can use ultrasonic vibrations to atomize liquid water into micrometer-sized water particles. You can sleep well. Night light function: For the first time, press the spray button to turn on the LED night light (warm light). If you press the fog button a second time, the LDE night light switches to breathing light (warm light). Press the spray button a third time to turn off the night light function. Waterless auto-off: If the water level is lower than the water level probe in the water tank, all spray modes are switched off automatically. Really anti-dry protection, longer life. Properties: Health-friendly material With ABS + PP + silicone, health-friendly materials can be used in the long term. Whisper Fairly less than 30 dB Whisper-quiet operation will not affect your child's or baby's sleep. Perfect for gifts With their unique, stylish design,humidifiers are a great choice for gifts. SPECIFICATIONS: Input voltage: DC 5.0V Working current: 200-450mA Spray amount: 30 ml - 50 ml / h Using power: 1.0-2.25W Water tank capacity: 500ml USB power supply Waterless auto-off LED night light Large capacity 500ml Moisturizing for 8-16 hours How can you improve your air quality with the humidifier? Relieve the stress of life in four steps. Step 1: Twist counterclockwise to unscrew the top cover. Step 2: After twisting off the top cover, add water to the water tank. Step 3: Turn clockwise, tighten the top cover and connect to the power supply. Step 4: Press the button for the product to work.