Auto Dimming:A sensor at the bottom of the lamp helps automatically adjust the brightness according to the surrounding environment. Rectangular Light Distribution Via Lens:A lens converges light and forms a rectangular light the desk through precise optical design of light distribution. Full Spectrum Light Source:Customized full-spectrum violet lamp beads over Ra 95 for eye protection. Three Color Temperature:Three modes of white light (6000K), warm light (3000K) and mixed light [4500K] are available for different scenarios. Brightness Stepless Adjustment:Long press the power button to adjust the brightness steplessly. Luminous Flux:60-249 Model Number:Desk lamp Switch Type:Touch On/Off Switch Power Source:DC Voltage:5V Light Source:LED bulbs Rated power: 5w Battery capacity: 2200mah Charging time: about 3h Working time: high light about h, low light about 13h Colour:Dark Gray Material:ABS Package Contents: 1 x LED desk lamp 1 x USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.