WindFire&reg; 3X CREE XM-L T6 U2 4 Modes Super Bright 5000Lm Headlamp with Adjustable Base 18650 Rechargeable Batteries Headlight Bicycle Light with 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 Not Included ) Aluminum alloy casing, waterproof design, long service life Suitable for all kinds of outdoor activities like camping, hiking,climbing,fishing, night walking