Equipped with 900-lumen burst mode and broad beam system, the E35 Ultimate Edition provides a brighter and broader coverage. Apart from the three brightness levels and single button operation, the light also features stylish cooling fins and anti-roll body design. Powered by one 18650 Li-ion rechargeable battery or two primary CR123Abatteries, the E35 Ultimate Edition delivers 900-lumen maximum output and 140 hours runtime on low output. Features Cree XM-L2 U2 LED with a lifespan of 50,000 hours Uses one 18650 rechargeable Li-ion battery or two 3V CR123ALithium batteries 130mm(Length) x24mm(Diameter) 72-gram weight (excluding batteries) Digitally regulated output - maintains constant brightness Reverse polarity protection guards against improper battery installation Slip-resistant body design Side switch on the head for simple and convenient operation Capable of standing up securely on a flat surface to serve as a candle Made of durable aircraft-grade aluminum Premium Type III hard-anodized anti-abrasive finish Toughened ultra-clear glass lens with anti-reflective coating