color: blue [Ultra-high brightness and eye care] Equipped with 4 flicker-free and blue-light-free LEDs, it can provide you with enough brightness for book reading or knitting, and avoid eye fatigue. Each head has its own independent switch, which can adjust 3 kinds of brightness. The special head design illuminates the smallest area with bright enough light to protect privacy without disturbing the sleeping partner at night. [Rechargeable and long-lasting storage] You can enjoy up to 40 hours of wireless reading time without spending time. (Varies with brightness and usage). Includes standard micro-USB cable. If you don't have the right cable, you won't have a headache. [Comfortable Wear] Super soft silicone can maximize wearing comfort even within a few hours. The ergonomic design around the neck fits your neckline. The contact part is equipped with soft pads. It is very suitable for reading, knitting, camping or repairing in bed.