Hands-free book light: The design of the neck reading lamp makes your hands completely free. With the book lamp, you no longer need to hold a flashlight on your hands or mouth, just wear the light around your neck when you are reading or repairing, helps focus on what you are doing without worrying about the light. With its flexible arms, you can choose the best lighting angle in a different environment USB Rechargeable: The built-in 1000mAh lithium battery only needs 2-3 hours to fully charge, 6-8 hours of continuous use in high brightness and 10 hours in normal brightness, so you dont have to waste money on buying batteries 3 Lighting Modes: The book reading light in bed has 3 adjustable temperature light modes: Yellow (3000K), Warm White (4000K) and Cool White (6000K). 3 lighting modes on each side can meet your different lighting needs just by clicking the button (adjustable independently) Adjustable Brightness: This dimmable neck light is equipped with 4 LED lamp beads, which can be used for different Lighting requirements are appropriate. At any color temperature, the upgraded book lamp can adjust the brightness of the light by long pressing the switch Lightweight and Portable: The book light weighs only 100g and is bendable, does not take up much space and easily fits in your pocket, bag or your suitcase. Easy to carry and use