Powerful rechargeable lithium battery. Its 700mAh battery can be fully charged in just 3 hours, with high brightness lasting 6-8 hours and brightness up to 10 hours. No need to waste money on batteries. 4 LEDs total 4 brightness. 2 per arm, 1 spotlight and 1 wide angle LED on each side. The 1st click is the wide-angle light, the 2nd click is the spotlight, the 3rd click is the Spot & Wide light, and the 4th click is the Spot & Wide light. Each arm has the same function. Flexible weapons. Steel alloy arms offer flexibility and strength. The arms are covered with soft silicone, which is non-toxic, safe to use and high-end. Lightweight, compact, portable and durable. Weighing only 3 ounces, the bendable book light doesn't take up much space and can easily fit into your carry-on luggage, making it ideal in all aspects. Package:1pc