Invented by a police officer, the PowerFlare PF-200 Safety Light is an ideal piece of equipment for police, firefighters, EMTs, rescue first responders and members of emergency response teams. This waterproof, compact (4-inch) light emits 360 degress of ultra-bright light from an array of 16 LEDs, visible for up to 10 miles away. The PF-200 Safety Light has 7 flash patterns, including U.S. Coast Guard approved "SOS" (Morse code) and solid-on (lantern). Runs up to 100 hours. Replaceable CR123 lithium battery included. Unlike flashlights with alkaline batteries or chemical light sticks, PowerFlare units can handle extreme temperatures, can be used in HAZMAT situations (intrinsically safe), and feature a 10 year storage/shelf life, using lithium batteries that won't ever leak.