Double Nozzle Ultrasonic Humidifier Adopting a double outlet design, the atomization effect is 2.5 times that of conventional desktop humidifiers. It humidifies powerfully from two nozzles, moisturizing your personal space. With just one button, you can choose from 4 mist modes to suit your preference and the situation. It combats dryness and prevents dry skin while creating a relaxing atmosphere. This small humidifier also functions as an air purifier, cleaning and purifying the air, and preventing illness. It's the perfect humidifier for the autumn and winter seasons, helping with colds, stuffy noses, allergies, and asthma. 【Water Level Detection & Dry-Burning Prevention/Leakage Prevention】Equipped with "dry-burning prevention" and "leakage prevention" functions. The transparent water tank makes it easy to check the remaining water level. With a 400ml large capacity, it can humidify for up to 13 hours, allowing for long-term use without the need for frequent refills. If the water level is too low, the unit automatically senses the low water level and activates the dry-burning prevention protection mode. In continuous mode, the power automatically turns off after 6 hours, so you can use it without worry during long periods of use, such as when you're out or sleeping. It's also designed to be spill-resistant even if accidentally knocked over! The humidifier's opening is a screw-in type, and the tank is sealed, making it difficult to spill even if accidentally knocked over. 【Built-in 2000mAh Battery & Rechargeable Portable Humidifier】This desktop humidifier can be used not only from a USB power source but also has a built-in battery. It incorporates a 2000mAh 18650 lithium battery, allowing for cordless use after a full charge. When used in single nozzle mode, it operates continuously for over 10 hours. The unit is also compact and easy to carry. You can humidify wherever you go, freeing you from the stress of dryness. Ultrasonic humidifiers use ultrasonic waves to turn the water in the tank into fine particles, delivering ultra-fine mist for moisture. By humidifying, it also helps prevent colds, hay fever, and other ailments.