... be used for travelling,finishing 4.usb light with fan 5.usb charge USB light with fan,fan lamp,fan lamps,fan light,LED reading lamp,LED rechargeable ... time:5 hours for 32leds, 4 hours for fan, fan and lamp use at the same time,operating time ... off, it can be used for emergency. Also it with USB chargerthe most important function is, in hot weather, ... our best service to you JA-1980 usb light with fan