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3 Color 6 Brightness Adjustable 3 useful color temperature modes yellow3000K, warm white4000K and cool white6000K. 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 angle90 design. It is bright enough to the area you positioned and at the same time dim enough to not disturb your sound asleep partner.. Excellent Service Superior Guarantee Our Customer Experience Team is available at your fingertips 247 for anything you need We promise 1. 30-day return service and a 24-month warranty. 2. Original patented design. 3. FCC, CE, RoHS, PSE C-TICK certified. 4.Contains Glocusent Neck Reading Light, User Manual, Charging Cable, Bookmark No adapter..