[3 Colors & 6 Adjustable Brightness] Unlike other bedside reading lamps, the neck lamp has 3 useful color temperatures: yellow (3000K), warm white (4000K) and cool white (6000K). It has 3 brightness levels per arm and different combinations of reading lamp settings according to your needs. For example, a yellow light for general reading; a warm white for studying; a cool white for sewing or precision crocheting. [Rechargeable & Long Life] Compared with other Micro-USB book lamps, our USB-C rechargeable LED reading lamp is friendly and safer for the elderly and young people. That’s because USB-C is a “one size fits all” design, easy to plug in on any side. In addition, the built-in 1000mAh battery provides up to 80 hours of battery life (depending on the reading light settings). It keeps you away from the daily burden with non-dimming light. [Eye Care & Ergonomic Design] Our book light does not produce flickering or dazzling light, preventing you from eye fatigue, it is a perfect