Product Features Product Name：Neck Reading Light Product Size：10*7.4*1.1 IN Product Weight：4.6 OZ Material：ABS+RUBBER Watts：3.7 Color Temperature：3000K I 4000K I 6000K LED Lifespan：50000 Hours Battery Capacity：1000 mAh Charging Time：1.5H Powerful Time：6 I 12 I 40 hrs Package size：190*135*35 mm Include 1*Neck Reading Light 1*USB Type-C Cable 1*User Manual 3 Color& 6 Brightness Adjustable 3 useful color temperature modes: yellow(3000K), warm white(4000K) and cool white(6000K). Each head owns an independent switch for 3 brightness levels dimmable. You can choose a comfortable setting as you wish for reading, knitting, camping, or repairing etc. Rechargeable & Long-Lasting USB Type-C rechargeable which is reversible and thus easier to plug in compared with other Micro-USB. Up to 80 hours (general reading, single head) of powerful, non-diminishing brightness from the included premium rechargeable 1000mAh battery. Eye Caring & Ergonomic Design No flickering and blue light filter design with advanced LED beads. No eye strain any more for both kids and adults. The arms are supple and adjustable so you can get the angle most comfortable to you. Ergonomic neck around design, and it is totally hands free! Partner Friendly Special narrow beam angle(90°) design. It is bright enough to the area you positioned and at the same time dim enough to not disturb your sound asleep partner. Is Smart Device : no Battery Type : Lithium Metal Power Source : Rechargeable Battery Is Batteries Required : No Is Batteries Included : Yes