USB Air Humidifier battery Fan Adjustable,Covenov USB Fan Portable Mini PowerLaptop Computer power supply USB Air-conditioned cooling water spray humidifier rechargeable 3 Modes: First-Fan Mode, Second-Misty Mode, Third-Fan+Misty. Rechargeable battery operated fan, the USB powered fan comes with a rechargeable and replaceable 1000MA 18650 Li-ion battery, can be charged by USB charger, computer, power Powered by rechargeable battery with a micro USB port, Light-weight and handle design,convenient to carry anywhere and anytime. bankMulti-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 Beautiful Mermaid Fans, Great travel fans for cooling or beauty in hot weather activities like sun bathing camping