Signature TIR (Tactical Infra Red) is an assist headlamp for Infra Red Viewers. Three versions are available. Each one is tuned to the optimal viewing wavelength of the viewer. TIR-1 is best suited fo GEN1 products and mostly for recreational activities. TIR-II is most appropriate for Gen2 and Gen2+ viewers. TIR-III is optimized for Gen3 viewers. Each individual with a TIR unity will literally "light up" a large area for his benefit and that of the rest of the team. Lightweight and ultra durable, TIRs have been designed as "Bumpers with Lights." Efficient design permits continusous use throught the night, on the same set of 4 AA batteries.