Stepless Dimming and 3 Color Modes: Based on our unique design, our reading light has 3 useful brightness levels.warm(3000K), warm white(4000K) and cool white(6000K). Also, neck light comes with stepless dimming function for each arm, you can use various light setting combinations based on your needs. Upgraded Eye-Protecting Reading Light: Different from other brands of reading lamp, our book reading light features a wide and rotatable LED panel similar to a desk lamp that delivers uniform and soft illumination.There is no flickering, no shadow or dazzling light in our book reading light, allowing you to stay away from eye strain & eye fatigue. Choose our premium LED reading light for book lovers or bookworms, to experience comfortable and enjoyable reading. Rechargeable, Adjustable, Dimmable, Memory: Built-in 2000mAh battery provides up to 80 hrs working time (depending on your light settings). Choose from 3 color temperatures (warm, warm white, cool white) by clicking the switch button, or hold the button to adjust the brightness level steplessly. The memory function allows for instant access to your last customized setting after turning on the light. Ergonomic Design: The book lights for reading at night come with an ergonomic shape, hanging on your neck; the arms are supple and adjustable so that you can adjust to the most comfortable angle ideal lighting aid for hands-free activities.