YL-VV A100/E17 2000 Lumens XML-T6 Zoomable Tactical LED Flashlight for Hunting and Other Outdoor Activities(Green Light) A100 Latest Zoomable 2000 Lumen T6 XM-L TacticalTorch FlashLight. Power supply: 1 x 18650 battery or 3 x AAA batteries (Not Include). 5 switch modes : High / Medium / Low / Strobe / SOS (slightly click the tail cap to sellect). Lifespan up to 100,000 hours or more, no need to consider. Suitable for hunting, cycling, hiking, camping and outdoor activity etc.