XUEMEI SpecificationsColor: WhiteSize: 400 x 12570mmVoltage: DC5V Power:: 4.5w Battery capacity: 1800mAh Color temperature: 4000kLight color: white lightLight source type: 16 LED lamp beadsControl method: touch controlAttachment method: clipPackage includes1 x reading lamp1 x USB chargingcableLEDs with eye care light source bed clamp lamp bed white power cable with LED lamps, LED clampable desk lamp can emit natural and non-flickering light that does not hurt or strain your eyes. Perfect for reading, studying, working, drawing, sleeping and so on. Reduce eye fatigue and protect eyes3 brightness adjustable to optimally adapt to your needs. Press the button once to select the color temperature and long press to adjust the brightness. The freely twisted tube can be rotated 360 and offers you the best viewing angle. With the non-slip silicone pad on the base, it can also be placed smoothlyClip-on design with non-slip clamp base or bracket The maximum width the clip can open is 6 cm. You can mount this reading lamp on many positions such as a book, desk, headboard, shelf, bookcase, wardrobe, music stand, piano, and computer. You can also put it on a table as a normal table lampWidely used: LED clip on USB reading light provides a uniform and wider, evenly spread lighting area than other LED book lights, which is perfect for student dormitories, offices, bedrooms, children's rooms, kindles for reading, studying, etc. Note: 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.