Specification: Wattage: 0.4W. Power Source: Rechargeable Battery. Long press the switch: adjust the brightness of the light bright or dark. Light Source: LED Bulbs. Item Type: Book Lights. Is Batteries Required: Yes. Is Batteries Included: Yes. Features: Lightweight Book Light. Feature: Good Quality High Quality. Battery Type: LITHIUM ION. Feature: 1. Flexible Arms- Covered with soft silicone, bendable and strong, allows you to choose the best lighting angle in different environments, simple and easy to create the perfect illumination for yourself. 2. Hands Free- No more holding a flashlight by your hands or mouth, just wear the book light around your neck when you are reading or mending, helps to focus on what you're doing without worrying about the light. 3. 3 Brightness Modes- Includes flood light, spot light and combination, provides you with the proper light to meet your different lighting demands. Besides, lights at each end can be independently adjusted. 4. USB Charging- With inbuilt 1000mAh lithium battery, enables you to enjoy your wireless use up to 6-10 hours after 2-3 hours charge, so you do not have to waste money on buying batteries. Package list: 1x LED book light; 1x USB cable; 1x band; 1x user manual