The Tec-1 is the newest handheld light from Princeton Tec.. The compact Tec-1 has a heart of metal, wrapped by an outside made of the highest quality injection molded polymers. The Tec-1 is powered by a single CR123 cell, blasting out 250 lumens in a focused spot beam pattern. The digital tailcap switch is conveniently located; tap for momentary light or press for constant light. The 1” diameter makes this light compatible with many available mounts on the market.