The Nitecore SRT6i is the first model with the 4th generation Selector Ring from the Smart Selector Ring series. The well-known selector ring on the lamp head for changing the brightness has moved to the rear switch on the SRT6i and, in combination with the new double switch, enables precise access to the light levels.
By turning the selector ring, you select the lighting level or the mode and activate it with the mode button on the double switch. The mode button is designed as a two-stage button and also allows quick access to STROBE or Turbo mode.
The built-in high-performance LED provides a maximum of 2100 lumens, so the Nitecore SRT6i achieves a maximum lighting range of 510 meters. The included Li-Ion battery NL2150HPi is charged in the lamp via a USB-C charging port.
https://www.nitecore.de/beleuchtung/srt-smartring-tactical-serie/srt6i/nitecore-srt6i-2100-lumen