Limited-Time Holiday Offer: Get a FREE Fenix T5 Pen (a $24.95 value) with your TK21R. Choose "TK21R + FREE T5 Pen" in black or blue ink above. Available through December 31, 2026, or while supplies last. The Fenix TK21R is a genuine duty flashlight built for professionals who can't afford unreliable light. A Luminus SFT90 LED and Fenix's patented APF pulse-frequency transmission system combine for a powerful 3600-lumen output and a beam that reaches 480 meters with real consistency, not just raw numbers on a spec sheet. A dual tail switch puts Instant Burst and Instant Strobe one press away, ideal for momentary blinding or signaling when things move fast. A hidden USB-C port recharges the included 6000mAh 21700 battery in just 1.5 hours, and a battery-level indicator means you're never caught off guard mid-shift. Rugged IP68 waterproofing, 1-meter drop resistance, and intelligent overheat protection keep the TK21R dependable through extended use — from tactical operations to night patrols, this is a light built for people who carry one every single day.