4 LEDs IN TOTAL & 3 LEVELS OF BRIGHTNESS: 2 LEDs per arm, 1 floodlight and 1 spotlight per side. 1st click is floodlight, 2nd click is spotlight, 3rd click is floodlight and spotlight on, 4th click is off. Functions are the same for each arm. LUXNOVAQ neck lights can meet your various lighting needs. FLEXIBLE AND FLEXIBLE ARMS: This LED book light has flexible arms that are easy to choose the best angle for your needs. Soft silicone covered, non-toxic, safe to use and high quality. Perfect for reading in bed or in the garden/patio, walking the dog, repairing, crafting, working, knitting, etc. USB CHARGEABLE: Built-in 700mAh battery, with USB charging cable, the hug lamp only needs 3 hours to be fully charged and can last up to 6-8 hours with high brightness and 10 hours with normal brightness. LIGHTWEIGHT & COMPACT: Weighing only 0.33 lb, the bendable neck light doesn't take up much space and can easily fit in your carry-on suitcase, making it an ideal choice for a portable reading light. Hands-free and ergonomic design: Simply wear the light around your neck when you are reading or repairing, no need to hold a flashlight in your hand or mouth or wear a headlamp, helping you to concentrate on what you are doing without worrying about the light. The ergonomic, streamlined design of the lamp head improves the lighting effect during reading, enabling you to position and focus the light exactly where you want.