[Unlike other bedside reading lights, the bedside lamp is available in three useful color temperatures: yellow (3000K), warm white (4000K) and cool white (6000K). It has 3 brightness levels per arm, with different combinations of reading light settings to suit your needs. For example, yellow light for general reading, warm white light for studying, and cool white light for precision sewing or crocheting. [Rechargeable & Long Lifespan] Compared to others USB eReaders, our USB-C rechargeable LED eReader is user-friendly and safer for old and young people. This is because USB-C is a "one size fits all" design that can be easily plugged in from either side. Additionally, the built-in 1000mAh battery provides up to 80 hours of battery life (depending on eReader settings). It allows you to no longer have to charge your devices every day while enjoying unaltered light. [Eye protection and ergonomic design] Our reading light does not produce flickering or too strong light, which saves 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 reading light 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 wish to illuminate, emitting rich light without disturbing your partner. A perfect e-reader for readers in bed.