WindFire New Wf-501b Cree Xm-l T6 LED 1000 Lumens 1 Mode 3.7-18v Flashlight plus 2x WindFire 4000mAh 18650 Rechargeable Batteries and Smart AC Charger CREE XML T6 1000 Lumen LED flashlight Aluminum alloy casing with o-rings for waterproof and shockproof design One switch mode, Easy to operate, One-Button-Operation, Low power consumption. Powr Source: work with 1 x 18650 Battery Perfect flashlight for outdoor activities like hiking, camping, hunting, and so on.