Turbine Blades, More Concentrated Wind Power: JISULIFE portable turbo fan adopts 9-blade design, with high-speed three-phase brushless motor, providing a maximum wind speed of up to 10m/s. 40000 RPM, which is twice that of ordinary handheld fans, brings you a strong and stable wind experience Long Battery Life, 18 hours of Coolness: JISULIFE handheld mini fan is equipped with a 5000 mAh battery capacity, which can provide up to 18 hours of battery life, it provides relief from hot flashes anytime, anywhere 5-Speed Adjustable, One-Touch Operation: This handheld fan offers 5 turbo wind speed settings with indicator lights. A short press switches between speeds. A long press turns it off at any speed for easy operation Mini Size, Easy to Carry: Ultra-compact 1.3*2.4*4.7 inches design and weighing only 0.37 lbs, this portable fan can be easily put into your pocket or bag, safety lock on the side prevents accidental access. Includes a lanyard, perfect for travel use USB Charging, Convenient Charging: The Rechargeable Battery fan is compatible with regular USB ports, laptops, portable power banks and car chargers, so you can easily get a seamless charging experience Gift essentials: The mini pocket fan will be your cooling companion for travel and outdoor sports, and the exquisite appearance is also suitable as a birthday gift or anniversary gift for women, men, moms, children and friends Outdoor Use: The turbine blades of this personal fan can concentrate wind force to produce strong wind. Its minimum noise is 55 db and the maximum noise is 76 db (at a distance of 30 cm), which is very suitable for cruise and camping