The Traser H3 utilizes the Tritium Gas Light Source that make them the easiest watches in the world to see in low light or zero light conditions. No need to press any buttons or hold them up to the light, the H3 dial illuminates continuously for a period of twenty-five years or more and is guaranteed for 10 years!

And no one makes a tougher, stronger, more durable sport, military or law enforcement timepiece. Trust the original Traser H3.