OttLite AY5009-FFP Led Desk Lamp with Sliding Dimmer and Usb, 3" x 7.25" x 17.12", White Touch Activated slid die adjusts 7 level of brightness Maximum lumens of 400 5V, 2.1a USB port fully charges smartphones and tables Super bright natural daylight leds rated to last up 40,000 hours LED panel light source for smooth, uniform Lighting