Versatility and Visibility – Up to four user-defined operating functions ranging in visible colors and IR signals-either flashing or steady. Enhanced lateral, top & bottom visibility. Intensity in any mode can be adjusted up or down for special requirements. Operating Extremes – Powered by a standard lithium CR123 photo cell for long life and extreme temperature operation. Waterproof and dust-proof. Simple Operation – Detented sliding switches are designed for operation by a gloved-hand, in the blind, with the helmet donned. Certain models provide firewall between visible and covert operating modes for heightened secure operations. Status Confirmation – Positive visual and tactile confirmation of ON/OFF and operating status with no guesswork. Helps prevent inadvertent battery depletion if left ON in IR mode. Batteries (NOT included) Safety – attachment provides emergency peel-away from helmet to reduce potential injury. 12 x 10 x 8 cm; 300 Grams