TF40 is a long shot magnetic ring dimming flashlight with exquisite workmanship, unique design of stainless steel guard system of stainless steel bezel, dimming ring and retaining ring on tail to protect the body! TF40 adopted CREE XM-L U2 LED, CC circuit drive, advanced dynamic infinitely variable dimming technology, output can adjust from 2-520 LM, run time from 1-100 hours, additional strobe functional make it not only easy to carry but also one powerful and essential tactical flashlight!