Features:
1. Ultra Compact and Lightweight but high lumens output - Length is 2.86 inches (72.6mm) and weighs only 0.75 ounces (21.2 grams) but it can offer max. 420 lumens output.
2. Multi purpose Angle Flashlight with Adjustable Elastic Headband (option) & Magnetic Tail Cap & Reversible Clip - offers us an almost infinite possibilities of use: it is comfortable, wear on the head (option), clips onto brim of hat for hands free use, on a table, hooked in trouser pocket, shirt, key chain, a cinch of a backpack, side of the car, refrigerator, any small field house, tent...
3. Extremely Durable & Waterproof IPX-8 & 2 Meters Drop Test- The aluminum housing with premium type-III military spec anodizing helps make the light extremely durable and abrasion resistant. PMMA high transmittance TIR optical lens is waterproof silicone o-ring and stainless steel bezel sealed. tact switch is waterproof silicone gasket, stainless steel button cap and stainless steel bezel pealed. IPX8 water-resistant; 2 meter impact resistance tested.
4. User-friendly One Button Interface - Easy & simple operation. 
5. New Lock out & Moonlight Setting - Lock out can prevent the light accidental turn on. When in moonlight mode, you can hold button to adjust 5-6 different stable, no flicker moonlights.

Specifications:
- Emitter: 1 x Luminus SST20 (Cool White: 6500k)
- Power by 1 x AAA or 10440 (Battery Not Included)
- Working Voltage: 0.7-1.8V, 3.0-4.3V

Max Output:

220 lumens (using an Eneloop AAA NiMH battery)
420 lumens (using a 10440 li-ion battery)

Max Beam Intensity:

730 cd (using an Eneloop AAA NiMH battery)
1300 cd (using a 10440 li-ion battery)

Max Beam Distance:

55 meters (using an Eneloop AAA NiMH battery)
72 meters (using a 10440 li-ion battery)

-Max run time: 230 hours (using an Eneloop AAA NiMH battery)
-Driver: Most efficiency constant current circuit (using an AAA battery)
-Protection: Reverse polarity protection
-Lock-out Mode: Prevents accidental activation
-Moonlight Mode: Multiple user choices moonlight levels
-Material: Aircraft-grade aluminum body
-Surface Treatment: Premium type-III hard-anodized anti-abrasive finish
-Button Cap: Stainless steel
-Clip: Stainless steel reversible clip
-Tail-cap: Magnetic
-Tail-stand Capability: Yes
-Lens: PMMA high transmittance TIR optical lens
-Waterproof Standard: IPX-8 (up to 2 meters)
-Impact Resistance: 2 meters
-Size: 72.6mm length x 19.2mm head dia. x 15.3mm body diam.
-Weight: 21.2gram (without battery)
-Accessories: Spare o-ring, key ring, stainless steel clip

Output & runtime (using an Eneloop AAA NiMH battery)
Moonlight   0.1-1 lumens    230hours
Middle       30 lumens         5.5hours
High          90 Lumens        1.5hours
Turbo        220-90 lumens  1.4hours
Strobe       220 Lumens      -

Output & runtime (using a 10440 li-ion battery)
Moonlight  5-30 lumens      12hours
Middle       90 lumens         1.2hours
High         220 lumens        35min
Turbo       420 lumens        30min
Strobe      420 lumens        -