This eye protection table lamp is stepless dimmable, USB powered, eye-protective and fully-adjustable. With the clamp design base, you can put it right where you need. The comfortable white light bulb with the Smooth Illumination Diffuser will keep eyes strain at bay. It can be used in computer desk, office table, bicycle head etc. Features: STEPLESS DIMMABLE: long press the button to adjust the brightness that is customized for you. USB PORT DESIGN: it's powered by USB charger, USB power bank or laptop, so it is convenient when you want to use it. EYE-PROTECTIVE: high quality LED bulbs, 500 lumens, flicker-free and anti-glare light without strobes and radiation, it can keep your eyes away from exhaustion. CLAMP DESIGN AND FULLY-ADJUSTABLE: the clip range of adjustment screw clamp reach 6cm and strong bendy tub enables you to swivel the lamp flexibly and adjust the light position as you need. DESK PROTECTION: the rubber in the clamp helps to create friction with the desk, at the same time it prevents any damage from the desk surface. APPLICATION AREA: 6cm clip range make it can be used perfectly with music stands, bookshelves, office tables, computer desks, headboards, bicycle heads etc. PORTABLE AND ADJUSTABLE LIGHT: excellent for college and university students who needs small footprint lights for reading and studying or wants to bring it with yourself. Specifications: Light color: White Brightness: Stepless dimming Luminous flux: 500LM LED quantity: 24 pcs Input: DV 5V Power: Max.5W Color temperature: 5000K-5500K Lifespan: 35,000 hours Material: Aluminum alloy Item color: White, Black(optional) Cable length: 160.0cm / 5.2ft Tube length: 25.0cm / 9.8in Lamp length: 27.5cm / 10.8in Clamp gap width: 6.0cm / 2.3in Item weight: 257.0g / 9.0oz Package size: 37.0 * 15.0 * 8.0cm / 14.5 * 5.9 * 3.1in(L * W * H) Package weight: 356.0g / 12.5oz Package list: 1 * Clamp Light with USB Cable