Fenix Flashlights E25UE Flashlight, Black 1000 Lumen output from two 14500 Li-Ion battery or 350 lumens from two AA batteries Maximum of five brightness levels, Plus Strobe and S.O.S Dual side switch for easy and fast operation Intelligent drive Circuit automatically determines output levels depending on the battery type used Included: lanyard, Spare O-ring, AA batteries x 2