describe Excellent LED, long life, no flicker, no radiation, high lumen and color rendering index, no flicker, eye protection. 3 levels of adjustable brightness to meet your different needs; sensitive T-bag design, easy and flexible operation. The USB port is designed to work with USB-C, USB-B or laptops. With the sturdy and flexible barrel, you have the flexibility to rotate the light and adjust the position of the light as needed. Built-in 800mAh high-capacity rechargeable battery, economical and durable. Specification: Light Color: White (6500-7000k) Base light color: warm white, blue (optional) Brightness Level: Level 3 Light source: LED Number of LEDs: 14 Input voltage: DV 5V 0.5A Power: 3 watts Luminous flux: more than 100 lm Color rendering index: greater than 80Ra Material: ABS plus LAS Battery: 1*3.7V 800mAh rechargeable battery White Product size: 280*110*100mm Product weight: 138 grams Packing weight: 240g become very rich