[3 Colors ] Unlike other lamps for reading in bed, the neck lamp has 3 useful color temperatures: yellow (3000K), warm white (4000K) and cold white (6000K). It has 3 brightness levels per arm and different combinations of reading light settings to suit your needs. For example, a yellow light for general reading; a warm white to study; cool white for precision sewing or crocheting. [Rechargeable and Long Lifespan]Compared to other Micro-USB book lights, our USB-C rechargeable LED book light is user-friendly and safer for the elderly and the young. That's because USB-C is a "one size fits all" design, easy to plug into any side. Additionally, the built-in 1000mAh battery provides up to 80 hours of battery life (depending on eReader lamp settings). It keeps you away from the daily burden with non-dimming light. [Eye Care and Ergonomic Design]Our book reading light does not produce flickering or glare light, save you from eye strain, it is a perfect night reading lamp for reading in bed. In addition, the reading lamps for night are equipped with an ergonomic shape, clinging to your neck; the arms are flexible and adjustable, making it easy to adopt. the most comfortable angle - an ideal lighting aid for hands-free activities. [Compatible with partners] This reading lamp has a narrow beam angle (90 ), which is low enough not to disturb people nearby. At the same time, neck lamp can illuminate the specific area you want to illuminate and emit abundant light without producing light disturbance for your partner. A perfect reading lamp for readers in bed. Products from He Wei's store Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.