[3 Colors] The neck lamp offers three color temperatures: yellow (3000K), warm white (4000K), and cool white (6000K). Each arm has three brightness levels, providing 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] Featuring USB-C charging, this LED book light is convenient and safe for users of all ages. The USB-C port is easy to plug in from either side. The built-in 1000mAh battery delivers up to 80 hours of runtime depending on settings, providing steady, non-dimming illumination and reducing the need for frequent recharging. [Eye Care & Ergonomic Design] This reading light produces flicker-free, glare-free illumination to help reduce eye strain, making it ideal for nighttime reading in bed. Designed to comfortably fit around the neck, it has flexible, adjustable arms that allow precise positioning for hands-free use during reading and other activities. [Partner-Friendly Lighting] With a narrow 90-degree beam angle, the light minimizes disturbance to others nearby while effectively illuminating your reading area. It delivers focused brightness without affecting your partner, making it perfect for shared sleeping environments.