[Adjustable brightness] Each head has an independent switch, 3 kinds of brightness can be adjusted. You can choose a comfortable environment when reading in bed, knitting, camping or repairing, etc. Use bright enough light to illuminate the smallest areato protect privacy without disturbing your night sleep partner. [Eye care and 4 LEDs] Ideal reading light, our book light is equipped with 2 LEDs on each head. The flicker-free and blue-light-free LED prevents eye fatigue in adults and children, not only reduces eye fatigue, but also helps sleep friendly. This necklight is equipped with 4 upgraded LEDs, which can provide more uniform brightness than ordinary LEDs. [Hands-free and ergonomic design] When you are reading or trimming, you only need to wear the light on your neck, no need to hold or hold the flashlight in your mouth, or wear the headlight, which helps to focus on what you are doing Things without worryingabout light. The lamp holder adopts an ergonomic streamlined design to enhance the lighting effect when reading, allowing you to locate and focus the light to the position you want. [Flexible arm and portable pocket reading lamp] The book lamp is used for reading on the bed, covered with high-quality, comfortable and soft ABS material, sweat-proof, abrasion-resistant, bendable, twisted, and folded into any shape, simple for its ownangle in different environments Create perfect lighting. Lightweight, it can be easily put into your carry-on suitcase or pocket. It is an ideal choice for all aspects.(Without battery)