WindFire&reg; 3X CREE XM-L T6 U2 4 Modes Super Bright 5000Lm Headlamp Base Adjustable Bike light with 2 X WindFire 18650 Rechargeable Batteries and USB Cable Powered and Charged by Mobile Power Bank, Computer and Any Other Digital Device with USB Port 3X CREE XM-L T6 U2 LED makes the brightness reach up to 5000lm. Intelligent circuit control, 4 switch modes, 1x Cree T6/ 2x Cree XM-l T6/ 3x Cree XM-L T6/ Flashing Model of Battery required: 2x 18650 3.7v (Battery Included ) Aluminum alloy casing, waterproof design, long service life Suitable for all kinds of outdoor activities like camping, hiking,climbing,fishing, night walking