Nitecore SmartRing Tactical series - SRT3 Defender - Black

SKU: Nitecore:SRT3-B
In stock!

It's tactical

Code named the Defender, the Nitecore SRT3 is the right size for EDC (every day carry).  Capable of multiple lighting modes; red for enhanced night vision, blue for hunting and fishing, red and blue police mode for Law Enforcement, the SRT3 is THE multi-light for on the go.  Measuring in at a compact 100mm or 3.93" in length, it's easy to pack this light in a small purse or back pocket.


  • Purpose-designed for law enforcement, self-defense and outdoor applications.
  • The world’s first line of flashlights to feature third generation SSR (smart selector ring) technology
  • Smoothly and rapidly select brightness levels and function by rotating a smart selector ring
  • Utilizes the latest CREE XM-L (XM-L2 T6) LED for a maximum output of up to 550 lumens
  • Second generation of ‘Crystal Coating Technology’ along with ‘Precision Digital Optics Technology’ provide extreme reflector performance
  • Boasts a peak beam intensity of 4,500cd and a throw distance of up to 134 meters (ANSI FL1)
  • High efficiency circuit board provides up to 200 hours runtime on lowest output level
  • Equipped with unique multi-colored (red and blue) tactical / signaling lights
  • Infinite brightness adjustment from 0.1 to 550 lumens
  • Six rapidly switchable functions to select from
  • Reverse polarity protection
  • Stainless steel titanium-plated clip
  • Stainless steel retaining ring protects core components from damage
  • Toughened ultra-clear mineral glass with anti-reflective coating
  • Constructed from aero grade aluminum alloy
  • Robust HAIII military grade hard-anodized
  • Waterproof in accordance with IPX-8 (two meters submersible)
  • Impact resistant to 1.5 meters
  • Tail stand capable

Levels and runtime:

Level Output / Runtime (RCR123) Output / Runtime (CR123) Output / Runtime (AA)
Beacon Varies  Varies  Varies 
SOS Varies Varies  Varies 
Police Warning Flash red & blue / varies Flash red & blue / varies Flash red & blue / varies 
Blue Blue / Varies Blue / Varies  Blue / Varies 
Red Red / Varies Red / Varies  Red / Varies 
Low 0.1lm / 150h 0.1lm / 200h  0.1lm / 200h
Variable 0.1lm - 550lm 0.1lm - 330lm 0.1lm - 180lm
Turbo 550lm / 45m 330lm / 1h 15m 180lm / 1h
Strobe 550lm 330lm 180lm
  • Length: 100mm / 117mm (with AA extension tube)
  • Head diameter: 25.4mm
  • Tube diameter: 25.4mm
  • 73g (without battery) / 87g (with AA extension tube)(without battery)
  • Quality holster
  • Removable clip
  • AA extension tube
  • Lanyard
  • Spare tail cap button
  • Spare O-ring
Model #
  • SRT3