Flexible reading light with rubber coating Suitable for night reading, ideal for use on airplanes, trains, and cars, as well as at home or anywhere else where good readability is required. Built-in 250mA Li-Po battery, no additional cables required. Simply plug it into a power bank, smartphone charger, or computer to charge the device. Whether as a bedside lamp, on a desk in the office, as a table lamp on a table, in the car, in a wardrobe, on a shelf, or on a music stand—with the portable mini clip-on lamp, you have the choice. Product Specifications: The light can be switched to three color temperatures, and the brightness can be continuously adjusted. Book light size: 20.5 x 4 x 0.9 cm Maximum brightness: 50 lumens; Weight: 45g Three-stage adjustable color temperature: 3000K - 5500K - 4500K; Power supply: new 250MAH ternary polymer lithium battery; Duration: about 4 hours, charging time: about 40 minutes; The red LED indicator lights up when charging and automatically turns off