1.[3 Colors Infinite Adjustable Brightness] 3 useful color temperature modes: yellow (4000K), warm white (4500K) and white (6000K), Each head has an independent switch for Infinite levels of brightness adjustable.Long press the Shift key to gradually decrease the brightness from 100%. You can choose a comfortable setting as you like for reading, knitting, camping, or repairing, etc. 2.[Durable Rechargeable] USB Type-C rechargeable which is reversible and therefore easier to plug in by compared to other Micro-USB. Up to 80 hours (general reading, single head) of powerful, non-dimming brightness from the included 1800mAh rechargeable battery, narrow beam angle (90). It's bright enough to cover the area you put down and loud enough at the same time not to disturb your sleeping partner. 3.[Ergonomic eye protection design] No flicker and blue light filter with advanced LED beads. No more eye strain for kids and adults. The arms are flexible and adjustable so you can get the most comfortable angle for you. Ergonomic design around the neck, and the hands are completely free. 4.[Adjustable and Foldable]: The lamp head can be rotated 270, and you can easily adjust a comfortable angle and brightness that suit your needs. It can also be folded and folded into desk lamp mode and placed on the desk in a balanced and stable way, which is more convenient for your writing. Color: Black Quantity: 1 piece Size millimeter: 250*160*30mm