JISULIFE Turbo Handheld Fan Battery [16 Hours Long Working Time] 4000mAh Portable Mini Fan USB Rechargeable with 5 Speeds for Travel/Outdoor/Home/Office - White

["Patented turbocharged airflow: JISULIFE Turbo Hand Fan has 2 vortex technology patents: air turbo and air nozzle. The airflow is accelerated and compressed by the air channel turbine, the wind is stronger, and the wind feeling is closer to nature", "5 Gear Turbo Wind: JISULIFE Portable Hand Fan Upgraded 5-gear turbo wind for strong cooling. Simply press the power button to change the wind setting, press shortly to switch between low speed (3300r/m) and high speed (6100r/m), and press long on any gear to turn it off", "16 hours maximum cooling time: JISULIFE Small Pocket Fan is equipped with a 4000mAh battery (twice as large as a normal hand fan), allowing for a runtime of 3-16 hours (depending on the speed). You can charge it via a regular power outlet, power bank, computer, or any other device with a USB port, only 3 hours to have a full charge", "Powerful and energy efficient: JISULIFE Hand Fan features a high-performance motor and an optimized air channel to enhance wind power while minimizing noise. Compared to other hand fans, it has a higher speed (6100 rpm) and stronger wind (4.8 m/s)", "Handheld fan & table fan: JISULIFE Mini Hand Fan comes with a wrist strap and an anti-slip mat on the bottom, allowing you to hang it around your hands as a hand fan when outdoors, and use it as a small table fan on a flat surface when indoors"]