Specification: Productname: NiwalkerBK-FA30SXHP35HI2200LMLEDFlashlight Brand: Niwalker Model: BK-FA30S EmitterType: XHP35HI Material: Aerospacegradealuminiumalloy Mode: L1,L2,L3,L4,L5,L6,Warningflash,Beacon,Strobe Lumens: 2LM,25LM,300LM,900LM,1500LM,2200LM, /, /, / Runtime: 25D,30H,8H,3H,2H,110Min, /, /, / BatteryConfigurations: 4x18650Battery(Notincluded) SwitchType: Clicky SwitchLocation: Sideoftheflashlight PeakBeamIntensity: 650000cd ImpactResistant: 1.5m MaxOutput: 2200LM Range: 1600m Waterproof: IPX-7 Color: Black Weight: 700gwithoutbattery Size: 76mmx56.5mmx177.5mm(HeaddiameterxTaildiameterxLength) Features: -Utilizes U.S. made XHP35 HI emitter. -Maximum output up to 2200 ANSI lumens. -Highly efficient constant current design offers maximum output and runtime. -Smart triple Multi-function clicky side switches. -Memory function to remember last output setting used (except hidden modes on main switch). -Advanced thermal protection circuit prevents overheating. -Unique smooth reflector design provides great throw beam distance and beam pattern. -Aircraft grade aluminum, mil-spec hard anodized for maximum wear. -Toughened ultra-clear tempered glass lens with anti-reflective coating. -Large cooper heat sink pad for superior thermal conductivity. -LED indicator turns red(below 12V) to alert user to switch lower output mode andrecharge batteries in time. -Tail red/blue LED for easy following. User Interface: -Press hold the main switch for momentary activation (100% output). Do second -press hold within 3 seconds for 100% constant on. -Double click the switch for instant strobe. -Triple click the main switch for lock out. -Press hold the main switch when light is on for changing outputs (0.2 lumen>25 lumen>300 lumen>900 lumen>1500lumen). -Once you release the switch, the light comes on constant output with mode memory. -When the light is on-double click to access hidden modes (SOS, beacon, warning flash). -Press hold the switch for changing hidden modes.(light flashes to let user know you are in next mode). One click gets you back to the output you were in. -You can save one different mode or output on each switch next to main switch. (Press hold the switch that you want to save - led indicator on main switch flashes means its saved. -All three switches are able to operate independently when modes/outputs are saved. Warning: -Please caution when using higher output levels. Light body gets hot when the light is on for long period of time and avoid shinning the beam directly into the eyes. This product is high power device and capable of causing eye damage.