Multper Portable Waist Fan 4 Speed 18000RPM 20H Runtime Strong Airflow

4-Speed & 18000 RPM Brushless Motor: Newly upgraded high-speed brushless motor with 7-blade turbo fan delivers 18000 RPM and airflow up to 45 ft/s. Four adjustable wind speeds from natural to strong match your needs. Powerful airflow instantly dissipates body heat for all-day comfort.3-in-1 Portable Fan: Use as a neck fan (with included lanyard), desk fan, or handheld fan. Choose the mode that suits you, indoors or outdoors, for perfect summer cooling.Lightweight & Compact: Weighs only 0.42 lb (lighter than a smartphone). IPX7 waterproof rating makes it your go-to companion for outdoor adventures. Ideal for running, cycling, car repair, camping, construction, gardening, delivery, warehouse work, and any outdoor labor.Long-Lasting Battery: Rechargeable 5000 mAh battery charges in 3.5 hours, providing 4.520 hours of continuous use (depending on wind speed). AI-powered chip extends battery life and keeps surfaces cool. USB-C charging port allows charging from power banks, computers, or any USB device.Wide Application: Dual-clip design with bottom air intake clip the large clip on your belt and the small clip on outer clothing for instant cooling. Perfect for daily commuting, hiking