Underwater Kinetics Super Q eLED Rechargeable Flashlight (Fluorescent Yellow) Energy conservation design transfers heat back into batteries for longer burn time and improved cold weather performance Underwater Kinetics' brightest, most compact dive light Beam produces a bright spot with almost no peripheral light for improved visibility in murky water Powered by rechargeable lithium ion battery or in an emergency 2 optional 123-type lithium batteries High impact ABS, LEXAN, polyurethane rubber, and stainless steel construction for durability