3 Colors: 3 useful color temperature modes: yellow (3000K), warm white (4000K) and cool white (6000K). Each head has an independent switch that adjusts 3 levels of brightness. You can choose a comfortable environment for reading, knitting, camping or repairing etc. according to your preference. It is also the perfect gift for children and the elderly. The rechargeable reading light is reversible and easy to plug in compared to other micro USB. A quick charge of only 2 hours provides up to 30 hours of wireless reading time, and the indicator light changes from red to green when fully charged. 3 Switches and Indicator Lights: There are 2 independent switches on the left and right. The triangle 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 triangle button is white when on, red when charging, and off when fully charged or off. Eye Protection & Ergonomic Design: With advanced LED lamp