HJIAN Portable Fan Handheld Fan Desktop Table Fan 3 Modes Speed Personal Fan Cooling Fan Rechargeable Fans Umbrella Fan with Bulit-in Battery (Green) Compact size fan with 3 modes speed wind. Easy to operate. Suitable to carry with when doing outdoor activities. Use it as a treadmill fan, baby stroller fan, sunbathing fan etc. Powered by built-in rechargeable battery. Please fully charge the fan to activate the battery capacity before firstly using. 2 ways of power, use the battery or connect with a USB outlet from computer, laptop or power adapter etc. Designed for personal space: Personal fan, portable fan, desktop fan, table fan, handheld fan, rechargeable fan etc. Portable fan, can be put in packet and there is two hooks in the back of the fan, can be hang in umbrella.