Durable, It can be used for a long time. | This USB light is great for home, remote/travel, study or office use. | Trusted Green Materials: item is made of environmental friendly silicone and metal; no harmful objects and no battery contained. | Energy efficient LED beads; bright light. It is normal the heat dissipation board gets hot when the lamp works. Don't worry about that. | Portable usb light,handy in different occasions such as bedroom night,outdoor camping, book reading, working and writing in night with your laptop computer etc.