This 5200mAh portable handheld fan is what you need to dispel the heat in this scorching summer. Features super-strong airflows in 3 various speeds to satisfy your needs. Will work using batteries or via USB outlet. It’s foldable and lightweight so it’s easy to carry around but powerful enough to be your best companion this summer, from reading in a library, cooking in the kitchen, or watching an outdoor game! • Long Lasting - This fan can work between 5 to 20 hours depending on its speed (speed 1 last 20 hours; speed 2 last 9 hours; while, speed 3 last 5 hours). Three times longer battery life than the average ones. • Strong Airflow - Speed 1 with 2400 RPM, speed 2 with 3100 RPM, speed 3 with 3600 RPM, has strong airflow to keep you cool. • Versatile and User-friendly - With a humanized handgrip and portable design, it can be used as a desk fan or handheld fan. Has a hanger and a metal clip that can be applied to office cards. • DC Brushless Motor, Adjustable Tilt - Using energy saving DC motor, up to 20000 hours working duration. The fan can be adjusted from 0°to 180° to satisfy your needs. • Multiple Power Supplies - Can be used with batteries or via USB and wall adapter.