Convenient and Adjustable Brightness: Designed with 18 LED lamps (18 lumens), producing natural and flicker-free light that won't harm or strain your eyes. And there are 3 light modes, you can easily adjust the brightness by pressing the button. USB Rechargeable Battery: Exceptional 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 a full charge, and the indicator light changes from red to green when fully charged. Portable and Flexible: This reading light has a 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, emergencies, suitable for study rooms, offices, bedrooms, living rooms, dormitories, also perfect as a night light for children's rooms.