Specification:BrandModel:Astrolux FT03 MINITactical RingAluminum alloyEmitter Type:XHP50.2Light temperature:6500K Cool whiteBeamstrength:51,000 CDMax Output:4200 LumensDistance452 Meters Flooding lightFirmware:Anduril UIAuxiliary light:YesBattery:1x 30Q 18650(included, batterybuilted in lightcan ship to more countries)or 1x 18350 (not included)unprotected 18650 recommended, andmust use unprotected 18350 battery.Driver:Texas Avenger FET Driver with chargingReflector:High quality smooth reflectorLens: Glass with anti-reflective coatingBody:Silicone rubberButton:Aerospace grade aluminium alloyImpact Resistant1.5 MetersWaterproof:Equivalent to IPX7, do not immerse in liquidsBody Color:Blue / Green / BlackWeight:Approximately 136g without cellsSize:with 18650 tube:144.8mm* 43.5mm* 25.5 mm(length* head diameter* body diameter)with 18350 tube:113.7mm* 43.5mm* 25.5 mm(length* head diameter* body diameter)User interface:[1] set to use SMOOTH RAMPING. Access to TURBO mode is alsoprovided.[2]Amoreconventional STEPPED RAMPING UI is available if you like discrete modes level. You can choose how many steps youwant.[3]MOMENTARY mode is useful for signaling purposes or rapidly/briefly lighting uptargets.To exit this mode, physically disconnect power[4]MUGGLE mode uses a reducedoutput.[5]It has an electronic LOCKOUT for safety, but acts also as momentary lowlight.Other functions: Battery check, sunset, beacon, tactical flashing, party flashing, bike flasher, candlelight, lightingstormAnduri