Specifications Emitter:OSRAM KW CSLNM1.TG LED, cold white, mounted on a COPPER DTP MCPCB Flux:~450 lm Throw:~300 m & ~23400cd Firmware:Tom E’s open-source GPL NarsilM v1.3 adapted by Texas_Ace User interface:[1] By default the GT Nano is set to use the very intuitive Narsil smooth RAMPING UI. Instant access to a 2.5A TURBO mode is also provided. [2] A more conventional discrete level MODE-SET UI is available as an alternative. Any one of 12 pre-defined mode-sets can be selected. [3] MOMENTARY mode is useful for signaling purposes or rapidly/briefly lighting up targets. Battery:One button-top 10180 Li-ion (included). Driver:Texas Avenger FET driver Reflector:20.8 mm ID, aluminum, smooth finish Lens:Glass with anti-reflective coating Body:Aluminum with Type III hard-coat anodizing Button:Tactile with back-lit rubber boot Ingress rating:Equivalent to IPX-8, underwater 2m Weight:Approximately 17g without cells Dimensions:24 x 52.5mm Charging the battery: Remove the insulation sheet before the first use. The indicator shows red when the battery is connected. The charging indicator shows red when charging, and turns green when fully charged. Notice: Extra 10180/10440 battery will load into a mini flashlight. Don't let it be fooled you.