The NITECORE SRT3 flashlight user manual explains features, operation, battery options, maintenance, and warranty details.
The NITECORE SRT3 is a purpose‑designed flashlight for law‑enforcement, self‑defense and outdoor use. It features a third‑generation Smart Selector Ring, a CREE XM‑L2 LED delivering up to 550 lumens, a peak beam intensity of 4,500 cd and a throw distance of up to 134 m. The unit is built from aero‑grade aluminum alloy, hardened with HAIII military‑grade anodizing, and is IPX‑8 waterproof and impact‑resistant to 1.5 m.
The manual covers how to switch the light on and off, adjust brightness modes by rotating the selector ring, install compatible batteries (CR123, RCR123 or AA with extension tube), and perform routine maintenance. Warranty information, safety warnings, and accessory options are also provided.
| Maximum brightness | 550 lumens |
|---|---|
| Peak beam intensity | 4,500 cd |
| Throw distance | 134 meters (ANSI FL1) |
| Waterproof rating | IPX‑8 (2 m submersible) |
| Impact resistance | 1.5 m |
| Runtime on lowest output | up to 200 hours |
| Length | 100 mm (117 mm with AA extension tube) |
| Head diameter | 25.4 mm |
| Weight | 73 g (87 g with AA extension tube) |
Press the tail‑cap button until you hear a click to turn it on; press the same button again until you hear a click to turn it off.