The white light uses a Luminus SST-40-W LED with a maximum output of 1800 lumens. UV light utilises 4 UV LEDs (320 mW, 365 nm wavelength). Optical system combined with crystal coating and Precision Digital Optics Technology (PDOT). Highly efficient DC circuit provides stable power supply for up to 50 hours. Two switches on the back allow intuitive control for tactical applications. Strobe Ready technology allows quick access to strobe mode. Strobe mode uses randomly changing frequencies for increased disorientation. Tactical mode and day mode available. Intelligent Li-ion battery charging circuit with USB-C port. Included in the scope of delivery: Nitecore 21700 Li-ion battery (NL2140i 4000 mAh). Power indicator next to the charging port shows the remaining battery power. Power indicator can display battery voltage (+0.1 V). Strike Frame utilises high strength silicon nitride ceramic for superior glass breakage. Integrated advanced temperature control (ATR). Optical lenses with scratch-resistant double-sided coating. Aerospace grade aluminium alloy construction. Robust HA III military grade anodised finish. IP68 waterproof and dustproof (submersible up to 2 metres). Drop proof up to 2 metres. Included : P20i UV torch, 4000 mAh Li-ion battery, CR123 battery adapter, NTH20 tactical case, USB-C charging cable, lanyard, clip, spare gasket.