【Long Service Life】: Each usb light is composed of 8 led beads with a service life of about 10,000 hours, and each bead is independent of each other. Even if individual beads are damaged, other beads can still work normally. 【Small and Portable】：These LED lights are small and portable(3.94 inches * 0.71 inches * 0.35 inches), you can put it in your pocket or hang it on your keychain. 【What You Get】: 8 PCS LED lights in one metal box(which is convenient for you to organise the lights).