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 brightness levels adjustable brightness. 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.Rechargeable & durable: USB Type-C rechargeable which is reversible and therefore easier to plug in 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've laid on and loud enough at the same time not to disturb your sleeping partner. 3.Eye Protection & Ergonomic Design: No Flicker & Light Filter blue 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 the desk lamp mode, and placed on the desk in a balanced and stable way, which is more convenient for your writing. Note: The data is all manual measurement, please please allow 1 - 3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received.