[3 Colors & 9 Adjustable Brightness] 3 useful color temperature modes: yellow (3000K), warm white (4000K) and cool white (6000K). Each light head has an independent switch to adjust 3 brightness levels. You can choose a comfortable environment for reading, knitting, camping or repairing, etc. according to your preference. It is also a perfect gift for children and the elderly. [Type-C Rechargeable] The USB Type-C rechargeable reading light is reversible and easy to plug in compared to other micro USB. It comes with a 1000mAh rechargeable battery that provides up to 30 hours of wireless reading with only 2 hours of fast charging, and the light changes from red to green when fully charged. [3 Switches & Indicator Lights] There are 2 independent switches on the left and right. The triangle button on the top is the main switch. Long press the switch to turn on/off, short press to adjust the color temperature. The light in the middle of the triangle button is white when on, red when charging, and off when fully charged or turned off. [Eye Protection & Ergonomic Design] Blue light filter and flicker-free, with advanced LED beads. No more eye fatigue for children and adults. The arms are flexible and adjustable so you can get the most comfortable angle. The ergonomic neckband design allows complete freedom of hands.