1020 Lumens On High 635 Lumens On Medium 280 Lumens On Low & 1 Lumen On Firefly Mode Run Time: 2.2-hours On High 2.4-hours On Medium 4.4-hours On Strobe 5.5-hours On Low & 305-hours On Firefly Cree Xm-l2 LED 741ft Maximum Beam Distance Crenelated Bezel On Both The Head And Tailcap For Self Defense Double Spring To Ensure Reliable Protection For The Battery During Impact Tempered Glass With Double-sided Coating Resists Breakage Or Scratching Mode Memory Will Automatically Enter The Last Mode Used Constructed From Aero-grade Aluminum Alloy Haiii Military Grade Hard-anodized Finish Impact-resistant To 6.5ft Waterproof (ipx8) Includes Holster Battery Tube Lanyard & 2 Spare O-rings Requires 2 Cr123a and rcr123a Batteries Or One 185450 Battery