LED Light Bulbs descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Rechargeable E-book Led Light For Kindle Paper, Reading Lamp. Features As a Bookmark Insert into Your Book to Hold in Place. One-piece Standard USB Charging Interface, Can Be Quickly Plugged into the Power Bank or Computer USB Interface. Can Be Filled in 30 Minutes, Lighting Time is More Than 2 Hours, Equipped with 130MA Polymer Battery, Cycle Charging More Than 380 Times. Built-in Advanced Power Management IC to Prevent Overcharge and Overdischarge. 4 Mode Dimming Specifications Size:20.5*4*0.9cm Patch Type White Light Source, High Light LED, 4 Intensities Of Lighting Brightness: 23LM, Temperature: 6000K, Power: Recharged Battery 3 Color Temperature Maximum Brightness: 50 Lumens; 3 Color Temperature: 3000K / 5500K /4500K Power Supply: 250MAH Ternary Polymer Lithium Battery; Maximum Brightness Duration: About 4 Hours, Charging Time: About 40 Minutes Package Included As Image . Products number : SOMONO107736