Comfortable & Adjustable Brightness: Designed with 18 LED bulbs (18 lumens), which produce natural and non-flickering light that won't hurt or strain your eyes. And there are 3 lighting modes, you can adjust the brightness just by touching the switch. USB Rechargeable Battery: Extraordinary battery life with built-in 1200mAh rechargeable battery and USB charging cable, you can use the lamp at high intensity for up to 3 hours after fully charged, and the indicator light will change from red to green when fully charged. Portable & Flexible: This reading light features mini size and compact design, making it very easy to carry. The gooseneck arm (360 rotatable) allows you to position the light as you wish. Usage: Perfect for reading, working, studying, emergency use, suitable for study, office, bedroom, living room, dorm room, also perfect as a night light for baby's room.