Essentials 38003- Brilliant Eco-friendly LED Portable Desk Lamp, Great for Students and People On-the-go, 3-Level Dimmer, USB-Charged Battery LED lights last for 25 Years under normal use and environmentally friendly 3 Hours of Cordless Power, offering total freedom from the power outlet Anti-Glare, Non-Flickering Natural Light 3 Levels of Brightness, 4 Hour Battery Charge Time with USB Foldable Space Saving Design, 180 degree vertical movement