Streamlight Survivor Series Flashlights boast superior construction paired with practicality. Unbreakable Lexan lens is coated with silicone anti-scratch coating for superior light transmission. The raised power switch allows for easy operation with gloved hands. The lightweight, durable, and reliable Survivor flashlights are powered by Ni-Cad rechargeable batteries that are rechargeable up to 1000 times using almost any power source. The bubls are C4 LEDs with over 50,000 hours of lifetime and shock proof construction. The Streamlight Survivor lights are o-ring sealed for water resistant operation. When you need superior personal lighting solutions - Streamligh Survivor Flashlight series is one of your best bets for reliable operation and ergonomic design.