Special Features RechargeableProduct dimensions 20D x 18.1W x 2.4H cmLight source type LEDCharging plug type USBSpecific Uses Book Reading Light with Eye Saver Mode, 3 Colors, 80 Hours Lifetime Rechargeable LED Light, Foldable Arm, Ideal Light for Reading, Knitting, Restoring with Mode Eye Saver,About this item1.3 colors and infinite brightness adjustable3 useful color temperature modes: yellow (4000K), warm white (4500K) and white (6000K), each head has an independent switch to adjust the brightness to infinity. Hold the Shift key to gradually decrease the brightness from 100%. You can choose a comfortable environment for reading, knitting, camping or repairing, etc. according to your preferences.2. [Rechargeable and Durable] USB Type-C is rechargeable and reversible, so it's easier to plug in compared to other micro USBs. 1800mAh rechargeable battery included, narrow beam angle (90), provides up to 80 hours (general reading, single head) of powerful, non-dimmable brightness. It's bright enough to cover the area you're lying on, but loud enough not to disturb your sleeping partner.3. [EYE PROTECTION & 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 on the neck for total freedom of hands.4. Adjustable Folding: The lamp head can be rotated 270, you can easily adjust the comfortable angle and brightness according to your needs. It can also be folded and folded into desk lamp mode, which is balanced and stably placed on the desktop, which is more convenient for your writing.