[Handheld Fan | Dual Semiconductor Cooling] Cool down in seconds This advanced fan combines powerful airflow with a semiconductor cooling chip to reduce surface temperatures to approximately 60°F (15°C) in just 10 seconds, instantly relieving the heat. [199-Level Speed ​​Control + LED Display] This fan meets all your cooling needs. Press a button to select between settings 1, 50, 100, 150, and 199. The LED display displays real-time speed (1-199) and battery life. [3-in-1 Multifunctional Design] One fan, unlimited cooling This ultra-flexible fan features a 180° adjustable head that adapts to your needs, instantly switching between handheld, desktop, and neck-mounted fan. [4000mAh Large Battery] This rechargeable handheld fan features a built-in 4000mAh long-lasting battery, eliminating the need for frequent charging. [15,000 RPM Turbo Fan | Ultimate Cooling] Experience powerful airflow like never before This high-speed handheld fan uses an advanced 7-blade turbine design and a precision three-phase brushless motor, which can reach a maximum wind speed of 18 m/s (40 mph), which is 3-4 times that of a standard mini fan.