The flashlight performs well both on patrol and in other tasks, and one of its biggest advantages is its low weight. It is also worth buying the tactical ring, because it really comes in handy. The only downside is that there is no option to buy an additional battery cell in the set so that the kit is fully matched, although I picked up a spare cell from another company myself. For 850 lumens, the flashlight shines very well, which can also be seen in the photo. The charging cable is also an interesting solution — thanks to its design, it can serve as a lanyard and additionally has a measuring scale. The Wuben T4 is a true point-support sword. It complements the Fenix TK17 perfectly; both flashlights work very well together and provide a lot of support both at work and during trips. I definitely recommend buying it, especially since the current price is really attractive — it is worth getting while it is still available.