ASP TRIAD flashlights are designed to professional law enforcement standards. They have gained a worldwide reputation for performance. The Triad presents a new generation of high intensity LED lights from ASP. Each Triad is precision machined from high strength aerospace aluminium. A satin black hardcoat finish is accented by an extremely durable foamed vinyl grip. The Triad Activation System is sensitive and quiet. The rear mounted switch provides universal orientation when grasping the light. The overmolded activation button is always under the thumb. The three position rotary collar is positive and direct. In the centermost position, the switch is locked off. The collar is rotated to the right for constant-on and to the left for intermittent light. Each Triad combines the innovative design and unparalleled manufacturing expertise of ASP. O-ring sealed for water resistance. Performance tested under the most severe conditions. Triad lights are unmatched in function and durability. Uses two CR123A Lithium Batteries.