【14-21 Hours Cooling Time】Up to 21 hours cooling time in one full charge. Super long battery life allows you to enjoy it while travelling, commuting, working and any other outdoor activities. This mini handheld fan is USB rechargeable through regular usb socket, laptop, power bank or car charger.

【A Palm-sized Backup Charger】Featured with unique and pocket size design, F8 portable fan is easy to jam into a bag to tote around.  And it is a perfect option as an external backup power bank to get your phone charged if necessary.

【Updated Strong Airflow】

• With enlarged blades, the wind increased 30% compared to the original version. Enough for personal use to keep you cool.

• One speed--1875 RPM

• Two speed--2575 RPM

• Three speed-3400 RPM

• Enough air to keep you cool as a personal fan

• With no frame design, makes the noise to 45 dB which causes no bothering during work.