<p>1.3 Color 6 Brightness Adjustable 3 useful color temperature modes: yellow (3000K), warm white (4000K) and cool white (6000K). Each head has an independent switch for 3 levels of dimmable brightness. You can choose a comfortable setting as you like for reading, knitting, camping or repairing etc.</p> <p> </p> <p>2.Rechargeable long-lasting USB rechargeable battery which is reversible and therefore easier to plug in compared to other Micro- USB. Up to 80 hours (general read, single head) of powerful, non-dimming brightness with the included 1000mAh rechargeable battery.</p> <p> </p> <p> 3.Eye Caring Ergonomic Design No flicker and light filter design 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 neck around design, and it is completely hands-free</p> <p> </p> <p>4.Exterior Design Special narrow beam angel design (90). It is bright enough for the area you have positioned and at the same time dark enough not to disturb your sleeping partner.</p> <p> </p> <p>5.LIGHTWEIGHT and COMPACTThe flexible neck light does not take up much space and is easy to fits easily into your suitcase. This makes it an ideal choice for a portable reading lamp.</p>