This minimalist style is designed to deliver maximum benefits. The Direct LED Desk Lamp with OttLite ClearSun LED technology makes seeing everything easier by reducing eyestrain by up to 51%. Adjustable at shade and counterbalance arm, you can easily direct the low heat, low glare illumination right where you need it. And, change the color temperature (ClearSun natural daylight, bright white and warm white), and brightness levels with the touch of a finger. Plus, the 5V, 2.1A USB port lets you fully and quickly charge your devices. Details: Brass 6" base diameter Height adjusts from 4" to 18" Includes 5V, 2.1A USB port to fully charge smart phones and tablets Proprietary, exclusive OttLite ClearSun™ LED – reduces eyestrain by 51% Provides smooth, uniform light with Color Rendering Index (CRI) of 97 3 color temperature modes Memory feature remembers your last setting for color temp 3 brightness settings with touch controls Maximum lumen output of 300 Adjustable, minimalist shade and long counterbalance arm locks lamp in desired position Energy efficient LEDs rated to last up to 40,000 hours