USB RechargeableEasily Charged with built-in USB, directly plug it into your laptop, power bank, adapter, car charger, or USB outlet for recharging, no additional cables needed;no more wasting money on batteries. 2 Brightness Levels50%, 100% brightness available, LED reading light can be adjusted 2 brightness levels by the button; short press to switch the brightness, long press to turn the book light off; brightness memory function, remains the brightness level you selected before. Flexible Reading LightCan stand alone or clip on a book; LED lens can be swiveled 90counter-clockwise, 90clockwise, 45downward;315flexible holder allows you to focus light exactly where you want it. Lightweight PortableSmall and lightweight, 1.38 ounce, ideal for a gift, clipping on a book when nighttime reading; can be completely folded flat and slim, portable for reading on airplane, train, or backseat of car when travelling. Delivery Quantity:1 Package Contents: Only the above package contents, excluding other products. Size:4.5x11*1.8CM (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color:White (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)