4Sevens Quark AA Tactical S2 Cool White Bright It cannot be opened until

It cannot be opened until the safety button on the end of the thumb stud is firmly depressed and the thumb stud is nudged outward

if you leave the X10 off for 2 seconds or longer

BUILT-IN LOW BATTERY INDICATION

designed specifically for safe trail running

4Sevens Quark AA Tactical S2 Cool White Bright It cannot be opened untilThe Quark Tactical subseries operates with a significantly different UI than the regular Quarks. This UI allows the user to program both primary and secondary outputs. Overview Main Features Power: One AA Battery (0. 9V~4. 2V) Output: Maximum 95 ANSI lumens; Moonlight 0. 4 ANSI lumens Runtime: Maximum 57 minutes; Moonlight 422 hours Strobe: Strobe, S. O. S., and Beacon flash modes Specifications Powered by: 1 AA battery (included) LED Emitter: Premium