This is a very useful USB table lamp with 18 LED. It can illuminate in even the murkiest situations. Just plug it into your PC's or Mac's USB port or put in 3 X AAA Batteries， everything becomes perfectly clear. It’s an ideal choice for office and home.The sturdy flexible neck allows you to place the light in a comfortable position for optimum visibility.Features:1.With 18 high light long-life LED2.Slim and fashion appearance，easy to carry，perfect for students and officers3.Two levels of brightness set4.USB or 3xAAAbatteries(Not included) power supply5.With Magnifying Glass，can be used as a triple magnifier which is a ideal gift for old friends6.Free angle twistable neck to put the light anywhere as you likeSpecifications:1.Color:Black2.Material:ABS3.Size:base diameter:105mm，tube height:225mm，lamp shade diameter:90mm4.Power supply:USB or 3xAAAbatteries(Not included) 5.Application scope:Any brand of notebook and PC6.Hours of usage:50000 hoursHow to use:1.Directly plug the USB light into USB port of your laptop or PC，then turn on your laptop or PC，or disconnect the DC plug from light，insert batteries，it works.2.ON/OFF switch design of USB light，just turn on the switch for twice，the light level can be adjustable.3.When you connect the USB light to computer ，please remember to take out the batteries4.When it works，please put it on a stable and flat place5.Do not put it in moisture environment6.If it does not use for a long time，please pull the plug from the USB socket and take out the batteriesPackage includes:1 x USB Lamp1 x USB Cable