Small clip-on lamp. Big, bright light. When it comes to sleek and elegant portable lighting solutions, this Ivation clamp lamp delivers in spades. It weighs in at a mere few ounces and measures just 4.7" x 2.2" 1.6". Turn it on, and you'll be amazed at its brightness and lighting power. The secret is in its lighting array: 14 super bright, super efficient LED bulbs are packed into the small lamp head. They deliver immediate maximum brightness upon power on, and remain flicker-free and cool to the touch through the night. The bulbs are rated at a life up to 10 years. Touch on. Touch to dim. Touch off. The lamp shows no visible buttons that could dampen its sleek profile. Instead, you'll find a single touch-sensitive mark that serves as the controller. Tap it once to turn on, tap it again to bring the brightness up to medium, tap it again to increase the brightness to max brightness, and tap it once more to turn the lamp off completely. In all brightness settings, you'll enjoy reliable, flicker-free LED light. The lamp head even features a translucent shade that disperses the light evenly so it remains easy on the user's eyes. Runs up to 12 hours per charge. Packed into this lamp's fashionably portable body is a 650mAh rechargeable battery. You can charge it from a laptop or (with an adapter NOT INCLUDED) from a standard wall outlet using the included USB cable. Thanks to the incredible energy efficiency of the LEDs, which consume 75% less energy than incandescent bulbs, the lamp can run for 12 continuous hours on low, 10 hours on medium, and 8 hours on maximum brightness. Once the lamp begins to dim on its own, it's a sign that the battery level is low and charging is needed.