Overview: 1.?ULTRASONIC COOL MIST TECHNOLOGY?: Adopted Ultrasonic Cool Mist Technology, No noisy voice. It will not interfere with your sleep or work, with environmentally friendly material. 2.?HELPFUL FOR YOUR HEALTH?Effectively improve indoor air conditioning. Increase humidity and also help prevent dry and chapped skin in dry seasons with no noise, lift your spirits and relieve stress. 3.?AUTO SHUTDOWN TECHNOLOGY?: No Built-in Battery, USB Powered. 4 hours automatic power-off protection. When the water runs out, it automatically stops running. 4.?EASY TO USE?: Open the silicone cactus top, pour the pure water into it (The capacity of the humidifier is up to 280ml), close the lid, connect it to PC, mobile battery, etc. with a USB cable and press the button. Product information: Capacity: 280ML Rated voltage: DC5V Rated current: 0.5A Rated power: 1.5-2W Color: white, pink, gray Scheduled shutdown: 4 hours Spray volume: 50ML/H Product size: 130mmx80mmx80mm Packing list: Humidifier * 1 power cord * 1 manual * 1