Fenix HP15 UE 900 Lumen long throw CREE LED Headlamp (Grey) with Four EdisonBright AA Alkaline batteries bundle (Ultimate Edition HP15UE) 900 Lumens using Cree XM-L2 (U2) LED with a lifespan of 50,000 hours Uses four AA batteries, either Ni-MH or Alkaline Digitally regulated output maintains constant brightness and lockout function, prevents the light from accidental activation 60-degree tilt mechanism and reverse polarity protection guards against improper battery installation Bundle include 4 X EdisonBright AA Alkaline batteries in addition to batteries inside package