[3 colors and 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 levels of brightness. You can choose a comfortable environment for reading, knitting, camping or repairing, etc. according to your preferences. 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 USBs. It comes with a 1000mAh rechargeable battery that provides up to 30 hours of wireless playtime with just 2 hours of quick charging, and the light changes from red to green when fully charged. [3 switches and indicator lights] There are 2 independent switches on the left and on the right. The triangular button at 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 triangular button is white when on, red when charging, and off when fully charged or off. [Eye protection and ergonomic design] Blue light filter and flicker-free, 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. The ergonomic design of the neckband allows complete freedom of the hands.