CREE XM-L U2 bin LED with 50 000 hour life span.
Maximum output: 658 lumen
High efficient constant current circuit and output-luminance
Microcontroller drive circuit
Tactical High Mode, and side switch Infinitely variable brightness system
Hidden Strobe and SOS, Quickly click 2 times side switch --> Strobe , and quickly click 2 times again---> SOS
Working voltage: 2.7VDC - 8.5 VDC
Battery Types Supported: 1 x 18650 or 2 X CR123A
Runtime: High output at 2.5A: 658 lumen max for 132 minutes. Low output at 0.01A: 5 lumen max for 39 hours
Mil. Spec. Type II hard anodized aircraft grade 6063-T6 aluminum alloy
Color: Gray
Ergonomic grip with anti-roll design
Candle function with ability to stand on tail cap
Tactical forward tail cap switch
Bezel: stainless steel
High performance aluminum smooth reflector with concentrated beam shot
Waterproof: IPX-8 Standard
Lens: Toughened ultra-clear coated and anti-abrasion glass
Dimensions: Length 163mm, Head Diameter 45mm
Weight: 147g excluding battery
Accessories: Lanyard, spare o-ring, and rubber tail cap button
Features

Specially designed for Military, Law Enforcement, Selfdefense, Hunting, Search& Rescue and Outdoorsman
Tactical-on side switch Infinite brightness accessible
Stainless steel retaining ring on the bezel protects the head from drops and impacts.
CREE XM-L LED
Max output of up to 658 lumens with an effective range of 400 meters
New hybrid reflector specially designed for CREE LED, which allows for better beam quality, efficiency and throw capability
Newly designed high efficiency broad voltage drive circuit
IPX-8 standard waterproof
change brightness by continually pressing on the side cap button until the desired 100% to 1% to 100%,and stop when you got desired brightness
Flickerat 3V. Cut off the power at 2.75V