[3 Colors] The neck lamp features 3 color temperatures: yellow (3000K), warm white (4000K), and cool white (6000K). It offers 3 brightness levels per arm and multiple lighting combinations to suit various needs. Choose yellow light for general reading, warm white for studying, and cool white for detailed tasks like sewing or crocheting. [Rechargeable & Long Lifespan] This USB-C rechargeable LED book light is convenient and safe for users of all ages. The USB-C port is easy to connect and widely compatible. The built-in 1000mAh battery lasts up to 80 hours on a single charge, depending on the brightness setting, providing consistent, non-dimming light. [Eye Care & Ergonomic Design] The reading light produces no flicker or glare, helping to reduce eye strain, making it ideal for nighttime reading. Designed to rest comfortably around the neck, the flexible arms can be adjusted to the optimal angle for hands-free reading and other activities. [Partner-Friendly Lighting] With a narrow 90-degree beam angle, the lamp illuminates your reading area without disturbing others nearby. It delivers focused, ample lighting, making it a great choice for shared spaces or bedtime reading.