WindFire? New Outdoor Super Bright CREE XM-L XML T6 U2 LED 1800 Lm Headlamp Rechargeable Headlight + AC Charger & 2x WindFire 4000mah 18650 Rechargeable Batteries (Black and green) CREE XM-L T6 U2 LED makes Output brightness up to 1800 lumens(Maximum) Material: Aluminum alloy casing, avoid high temperature, fall-off protection Internal wiring applies the high efficient booster circuit,working voltage is wide 3 switch Mode: Strong Brightness / Normal Brightness / Strobe Power Source: 2 x WindFire 4000mAh 18650 Battery ( Included )