Brivation Dimmable LED Desk Lamp, 3 Dimming Levels, Eye-care, Touch Sensitive, USB Charge/4AA Batteries Table Lamp, Office Lamp, Reading Lamps, Bedroom Lamps White Modern Design: Simple and stylish, USB/Battery two ways operated, Easy to operate, Portable and lightweight. 3 Levels Dimmable: Touch sensitive control with 3-level brightness,best for reading, relaxing, and studying, fit anywhere including home, office or bedroom. Eye-Care: Does not contain any mercury or emit harmful UV radiation, no ghosting, no glaring, and no flickering. Adjustable Angle: Lamp can be adjusted 180 degrees, Ultra-flexible gooseneck arm with 360 degrees flexibility that you can easily light up where you want it. Low power consumption: Energy Efficient LED Desk Lamp that will reduce energy spending by 80%, 30 Bright LED Lamp beads, 100% natural light, Energy-efficient LED light that can bright last up to 50,000 hours. Comes with a 1-year warranty. Material: ABS Plastic Power Consumption: 5W Led beads: 30 LED Light source: Mid-Power/SMD LED Color temperature:2500-7000K LED lifetime: 50000hrs Maximum Lumen Output: 280 Product dimension:33*5.12&#034; Product weight:140g/4.94 oz Usage time: High 3-4 hour, Mid 6-7 hours, Low 8-9hours