ERCRYSTO USB LED Light for Computer/Keyboard/Notebook/Laptop/PC, 3 Levels of Brightness suitable for Reading/Relaxation/Bedtime, 360 Degrees Rotation,Color White Simple & Smart- just one touch, switch to 3 brightness level sensitively Long lasting - expectancy up to 10000 hours after each charging Attractive appearace - eleglant design, smooth handfeel and light weight Easy to charge - Standard USB port, plug directly into the USB port to take power or use the plug directly Suitable for different equitment - Suit for notebook computers,desktop computers and mobile power supplies etc