3 colors and 6 brightness settings] Unlike other bed reading lights, the Glocusent bedside lamp is available in 3 useful color temperatures: yellow (3000K), warm white (4000K) and cool white (6000K). It has 3 brightness levels for each arm, with different combinations of e-reader settings depending on your needs. For example, yellow light for general reading, warm white light for studying, and cool white light for precision sewing or crocheting. [Rechargeable and long life] Compared to others Micro-USB e-readers, our USB-C rechargeable LED e-reader is user-friendly and safer for the elderly and young people. This is because USB-C is a one size fits all design that is easy to plug into either side. Additionally, the built-in 2000 mAh battery provides up to 80 hours of battery life (depending on e-reader settings). It allows you to no longer have to recharge your devices every day while benefiting from unaltered light. [Eye protection and ergonomic design] Our e-reader does not produce flickering or too strong light, thus preventing you from straining your eyes, it is a perfect e-reader for the night. In addition, this e-reader has an ergonomic shape that hugs your neck; the arm is flexible and adjustable, making it easy to adopt the most comfortable angle - an ideal lighting aid for hands-free activities. [This e-reader has a narrow beam angle (90) which is low enough not to disturb people nearby. At the same time, the neck lamp illuminates the specific area you want to illuminate, emitting rich light without disturbing your partner. A perfect e-reader for readers in bed.