Model of LED: CREE XM-L T6Output bright can come to max Power by 18650:2200lumens [lm]Internal wiring applies the high efficient booster circuit， working voltage is wide and can utilize the batteries in the largest extentWaterproofing designAluminum alloy casingAluminum alloy reflectorAdjustable base is provided for each head lamp， with back and forth inclination3 switch Mode: Strong Brightness / Normal Brightness / FlashingPower By : 2 x 18650 battery (not include)Colour : BlackDimension : 38mmWeight : 135g Package Contents1 x Headlamp (Battery and Charger is Not Included)