Specification: Battery: 1x3.7 v / 2000mah Li-Ion battery (built-in) Charging voltage: 5 v / 500mA Addition time: 3 hours Working time: 8 hours Lumen: 350LM Battery indicator: red light (charging); full charge (blue light) Feature: 0-360 degrees foldable Size:L 22x16x2.5cm S: 14.5x10.5x2.5cm Color :White maple/Black walnut/Red walnut/Brown/Blue/White walnut Material Type:leather /wood Package included: 1 pc * book light  Notes: Due to the light and screen setting difference, the item’s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.