Specifications:Voltage: 5VColor:BlackBrightness: Poleless gradient dimmingIs Dimmable: YesLumens:50lmPower Supply: 150mAh li-on Battery(Included)Color Temperature: 6000kCharging Time: 30minLasting Time: 2 hours once fully chargedSize:20.5*4*0.9cm Feature:Clip on reading light for kindle, music score, books.USB rechargeable via power bank, PC, laptop and power adapter.It's eye-protective.With no-strobe LED light,it could protect your eyes.It has Poleless gradient dimming, just press the button to adjust as you need.The reading lamp is flexible. It could be folded and crooked to any angle you want.Multifunctional as bookmark, desk & Bed lamp, diverse uses, shape changeable. Package includes:1 x Book Light