<p>[Rechargeable and Durable] USB Type-C is rechargeable and reversible, so it's easier to plug in than other USBs. The included 1000mAh rechargeable battery provides up to 80 hours (normal play, single head) of powerful, non-dimmable brightness. blue</p> <p> </p> <p>[3 colors and 6 adjustable brightness] 3 useful color temperature modes: yellow (3000K), warm white (4000K) and cool white (6000K). Each head has an independent switch that adjusts 3 levels of brightness. You can choose a comfortable environment for reading, knitting, camping or repairing, etc. according to your preference.</p> <p> </p> <p>[EYE PROTECTION AND ERGONOMIC DESIGN] With advanced LED lamp beads, no flicker and blue light filter. Children and adults no longer have eye strain. The arms are flexible and adjustable so you can get the most comfortable angle. Ergonomic design</p>