Features:
- 1 LUMINUS SBT90 GEN2 LED ( Cool White) - Black Body Color
   Max. 5,800 lumens max output, Max beam intensity of 218,556cd and Max. 935 meters beam distance
- New optical grade PMMA TIR lens provides the higher quality and quantity of light in a soft and balanced beam
- Toughened ultra-clear glass lens with anti-reflective coating
- Power by 3x 18650 rechargeable li-ion batteries (3100 mAh included)
- Working voltage: 8.7V - 12.6V
- High efficiency constant circuit provides stable output (Non-PWM)
- With advanced intelligent temperature regulation module, MK37 regulates its output and adapts to the ambient environment, maintaining optimal performance
- Electronic reverse polarity protection and over-discharge protection
- Integrated power indicator in side switch indicates remaining battery power
- User-friendly Interface, easy & fast one handed operation
- One button control all brightness levels and functions
- Lockout mode prevents accidental activation
- Five user choices moonlight mode(0.1 - 2 lm) to meet different requirement
- Intelligent memory function stores the brightness mode & mode cycle last used
- Constructed from aircraft-grade aluminum alloy
- Premium type-III hard-anodized anti-abrasive finish
- Body oxidation color option: Black or Sand
- Premium cooling fins Design
- MK37 can be directly mounted to a tripod, turning it into a camp light or a fixed supplementary light
- Diamond-pattern knurling provide a better gripping surface
- Immersion gold and gold plated connector to ensure an effective conductivity
- Built-in lanyard hole (inner diameter: 0.138in / 3.5mm)
- Convenient tail-stand capability
- IPX-8 waterproof standard (2 meters under water)
- Compact & lightweight, weigh only 10.51oz / 298g
- Size: 2.0 inch /52.2mm (head diameter) x 1.85inch /47mm (body diameter) x 5.1 inch / 128.57mm length
- Accessory: Holster *1, Lanyard *1, Waterproof o-ring *1, Manual *1, 3/8" to 1/4" Tripod Thread Adapter *1, 3 Manker 3100 mAh 18650 high drain rechargeable batteries.

Output/runtime/throw distance (LUMINUS SBT90.2)
Moonlight            0.1 lumens    70 hours                            
Low                     70 lumens      30 hours                           103 meters
Mid1                  400 lumens      9 hours 30 minutes          226 meters
Mid2                1100 lumens      4 hours                           400 meters
High                2800 lumens      1 hours 40 minutes          670 meters
Turbo              5800 lumens      1 hours 25 minutes          935 meters
Strobe             5800 lumens -
Peak beam intensity: 218,556 cd
Maximum beam distance: 935 meters
Impact resistance: 1 meters
Waterproof standard: IPX-8,2M

Functions:

ON / OFF
ON: When the light is off, single click, long press, double or triple click the switch to turn it on.
OFF: When the light is on, single click the switch to turn it off.

General mode:
While OFF, single click switch to enter general mode. Press and hold on switch to cycle through 'Low >Mid1 > Mid2 > High' (or 'High > Mid2 > Mid1 > Low'). Release switch to select one level you want. While cycle to last level 'high' (or 'low'),the light will stay this level and stop cycle. If turn to other level, release switch, and then press and hold on switch again, the light will cycle to opposite direction 'High > Mid2 > Mid1 > Low' (or 'Low > Mid1 > Mid2 > High'). After entering in general mode, single click switch to turn it off; double click to Turbo; triple click to special mode.

Moonlight mode:
While OFF, long press 1 second to enter moonlight mode. there have 5 lower brightness levels from 0.1lm to 2lm. Press and hold on switch to cycle 5 different levels. Release switch to select one level you want as the similar operation in general mode. After entering moonlight mode, single click to turn it off; double click to Turbo; triple click to special mode.

Turbo mode:
double click to enter Turbo mode from any modes (except lock-out mode). After entering turbo mode, single click to turn it off; double click or long press to general mode; triple click to special mode.

Special mode:
While OFF, triple click switch to enter special mode. Press and hold on switch to cycle through 'strobe - beacon - SOS' automatically. Release switch to select one level you want. After entering special mode, single click switch to turn it off; double click to Turbo; Triple click to general mode.

Button breath flash mode:
While OFF, long press the switch for 3 seconds to enter button breath flash mode (firstly moonlight will turn on and then turn off).

Lock / unlock:
While OFF, quick quadruple clicks will lock-out the flashlight (4 flickers show successful lock-out). While locked-out, quick quadruple clicks again will unlock.

Intelligent Memory function:
While OFF, single click (or long press) to enter general mode (or moonlight mode) last used. And then press and hold on switch, the light will be cycled to next level in same cycle direction last used.