Portable COB work light is a useful tool for you,you can use it as normal LED flashlight for camping,traveling,hunting,fishing,or for emergency light for helping,or working light for car repairing and so on. With internal lithium batteries,rechargeable, and it can charge your mobile phones.With USB output charging port,can charge your mobile phones.Outdoor using: Camping,picnic,hiking,hunting,traveling,fishing,car repairing,outdoor party,emergency using and so on. Indoor using: Lighting for house,kitchen,underground parking,hotel,warehouse,club.Solar charge, you can also USB charging, but also the field emergency to the phone charging, cob light source, highlight, the edge of more 16LED bright patch