1. 3 speed wind positions. Low position: Very soft and comfortable, helps you sleep better at night; Medium mode: the simulating natural wind, avoid headache and cold; Strong mode: constant speed, makes you cool fast. 2. Powered by USB and battery. This fan is USB port rechargeable. It can also be directly powered by batteries, USB cable can be charged with computers, laptops, power banks and more devices with USB output. 3. SPRAY DESIGN. This USB cooling fan is designed with beauty humidifier, blowing the soft and cooling small spray. Enjoy your coolness while the small spray drenches your skin in moisture at the same time. A perfect companion for you to drive away the heat wave. 4. Fits everything. Indoor desk fan and portable outdoor fan have a small size (18 x 10 cm/7.09 x 3.94 inches). Lightweight and handle design, very convenient to carry when hiking and traveling. 5. Quiet & fast cool down. Strong power ensures maximum airflow, quiet operation without distraction.