Fenix Flashlights TK15UE Flashlight Max 1000 lumen output from one 18650 rechargeable Li-ion battery or two CR123A Lithium batteries Five modes including 4 brightness levels and strobe Tactical tail switch for momentary-on function Limited Lifetime Guarantee from Fenix Lighting U.S Included: Holster, lanyard, spare O-ring, spare rubber switch boot