Nitecore EA21 360 Lumens 182 Yards Cree XP-G2 LED Flashlight Using 2xAA with Red Light & Lumen Tactical 4xAA Battery Box, Black Super bright 360 lumens compact LED Flashlight featuring Cree XP-G2 LED Convenient dual mode switch and power switch Use commonly available 2x AA Batteries (not included) Comes with a low red light to preserve night vision Comes with a holster, clips, spare o-rings and a Lumen Tactical Battery Box holds 4x AA Output/Runtimes: <ul class="a-unordered-list a-vertical"> Turbo: 360 lumen / 1 hr 15 min High: 220 lumen / 2 hr 15 min Middle: 110 lumen / 5 hr 45 min Low: 35 lumen / 11 hr Lower: 1 lumen / 30 hr Special Modes: Signal Light, SOS, Strobe, Beacon Battery: 2 x AA Dimensions: <ul class="a-unordered-list a-vertical"> Length: 5.57 inch (141.5mm) Head diameter: 1 inch (25.4mm) Tail diameter: 0.83 inch (21.2mm) Weight: 2.36oz (67 gram) (without battery) Strobe Mode rapidly blinks to quickly startle or alert viewers. SOS Mode blinks in the universal SOS pattern to signal distress to viewers or emergency services. Beacon Mode blinks in a slow lighthouse-style pattern to signal user&#039;s location. With the light on, press and hold both the power and mode switches simultaneously for over one second to enter lockout mode and prevent accidental activation. Simply loosen the tailcap to cut off power entirely. (This option is best for storing the EA21 for an extended period of time.)