LED USB Clip On LightFeatures: This lamp in ring shape adopting premium LEDs gives out soft and even light, no flickering 18 powerful LEDs with 3 Brightness levels for your options Featuring a sensitive touch control function for easily brightness adjustment Flexible tube, can be bended into any angle and any height that comforts you most while reading Built in rechargeable battery 2200mAh, each full charge can last up to 24hours With a non slip clamp, an be firmly