COMPACT This portable bed light is the perfect size for reading, studying, knitting, camping or travel. ADJUSTABLECreate comfortable lighting conditions during all hours of the evening. LED book lights will be perfect for your night reading, books, magazines, bedtime stories, newspapers and more. CONVENIENT This lightweight reading light for bed use is designed to cast just the right amount of light on a page or screen, while still being narrow enough to not disturb others nearby. GREAT GIFT Book Lights great as holiday gifts for college students, teens, coworkers, or any bookworms in your life. USB RECHARGEABLEThe book lights has a USB rechargeable which for any USB your computer, USB outlet . Specification: Light Gears: 3 Gears Usage Time: About 3 Hours It Can Rotate 360 Degrees. Press and Hold for Three Seconds to Turn on the Light, And It Will Automatically Turn off After 45 Minutes. Charging Time: 60min (Red Light When Charging, Green Light When Fully Charged) Size Chart: 16.3cmx8.4cmx1.9cm/6.42inchx3.31inchx0.75inch Package Includes: 1 Set LED Book Lights Rechargeable Note: Please allow slightly errors due to manual measurement and different monitors.