Emitter: 4x Cree XHP70.2 LED, neutral white or cool white, mounted on copper DTP MCPCB
Flux: >25,000 lm
Intensity: >469.1 kcd (ANSI throw >1370 m)
Firmware: Tom E’s open-source NarsilM v1.3 adapted by Texas_Ace
User interface: By default the GT4 is set to use the very intuitive Narsil smooth RAMPING UI. Instant access to a 21A TURBO mode is also provided.
 A more conventional discrete level MODE-SET UI is available as an alternative. Anyone of 12 pre-defined mode-sets can be selected.
 MOMENTARY mode is useful for signaling purposes or rapidly/briefly lighting up targets.
Battery: eight button-top unprotected 18650 cells . protected cells not fit. Cells are not included.
Driver: 12V, Texas Avenger V2
Reflector: 118 mm inner diameter, aluminum, smooth finish
Lens: Glass with anti-reflective coating
Body: Aluminum with Type III hard-coat anodizing
Tripod socket: Standard 1/4 inch threaded (1/4-20 UNC)
Button: Tactile with back-lit rubber boot
Ingress rating: Equivalent to IP65, do not immerse in liquids
Weight: Approximately 2.6 kg without cells
Dimensions: 135 mm Ø head x 318 mm length
GT4 uses free software distributed under the terms of the GNU Public License version 3
GT4 Anduril code from toykeeper/flashlight-firmware