1. 3 BRIGHTNESS LEVELS PER ARM: Flashlight; wide area light; full brightness flashlight and wide angle light. Use the bright enough light to illuminate the smallest area for reading without disturbing your sleeping partner. 2. BRIGHTNESS: brightness of 20000-22000mcd. Our book lights are equipped with 2 LEDs at each end. One LED is used in the flashlight spotlight mode and the other LED is used in the floodlight wide-area mode. Each arm has a separate switch for easy brightness selection. 3. SHAPE: U shape. No need to hold the flashlight with your hand or mouth, or wear a headlight on your When reading or busy with maintenance, nod like a robot to adjust the direction of light. Whenever you read, repair, make, work, weave, etc. on the bed or in the garden/terrace, this flexible neckband hug can help you focus on what you are doing without worrying about the light. 4. MATERIAL: The silicon of the neck is soft. The neck area is soft. The touch and wear are very comfortable. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.