GaGa MILANO Portable Mermaid Fan Handheld and desk Fans with Umbrella Hanging Metal Clip for Home Office cooling and Travel (Green) Mini Foldable design; can be used as a desktop fan or handheld fan. With a hanger can be attached to umbrella. Rechargeable battery operated fan, the USB powered fan comes with a rechargeable and replaceable 2000MA 18650 Li-ion battery, can be charged by USB charger, computer, power bank Unique design, creative style, made of high-quality ABS, has a solid structure and pressure-resistant. The advanced power management technology provides a variety of power supply. Use USB directly or battery-powered Great travel fans for cooling or beauty in hot weather activities like sun bathing camping.Multi-speed adjustable power fan, free to turn down or turn up air volume with the stepless speed technology. Efficient power and conversion circuitry can minimize the loss to save energy and protect environment. 1.BEFORE USE:Take off the insulation sheet on the battery both side .Or it can not be work .2.AFTER USE :Pls charge the battery more than 1 hour,because the new fan's battery have not enough power ,AND this fan is works with DC current ,so it can not work without battery .