Personal Air Cooler & Air Humidifier - It is not only an personal air cooler, but also an air humidifier. You can use the small evaporative air cooler all year round, cooling you in hot summer and humidifying the air in dry autumn and winter. A full tank of water can continuously keep spraying for 2.5-12 hours (depending on the speed). Adjustable Wind Speeds & Automatic Timing - 3 wind speeds (high,Medium,low) can be adjusted, manual up-down to adjust blowing direction within 60to meet your different needs.Three automatic timing (1/2/3H), you can choose the most suitable one to enjoy your leisure time,sleeping or working time. Removable DESIGN & Handle DESIGN - Removable design helps you more easily clean your water tank and add water& ice cube in the water container; Portable handle, you can easily carry it out, very suitable for homes, offices, outdoor picnics, etc. Power Supply Methods & Energy Saving - Simply connect the USB cable to the devices that support usb port. Besides, The portable air fan operates at a low energy consumption, much cheaper than running a Freon air conditioner. so you should not expect the same results as an air conditioner. Please Put it Beside You not over than 3ft-4ft.