size 1 means US Chargersize 2 means EU Charger Rechargeable HeadlampCREE XM-L T6 HeadlampModel of LED: CREE XM-L T6 2R5 LED Headlamp with 4 ModesInternal wiring applies the high efficient booster circuit， working voltage is wide and can utilize the batteries in the largest extentWaterproofing designAdjustable base is provided for each head lamp， with back and forth inclinationOne button switch : 1x Cree XM-L LED/ 2x Cree XM LED/ 3x Cree XM-L LED/ FlashingPackage Include: 100% Brand New1 x LED Headlamp1 x US/EU plug Charger 1 x Car Charger2 x 18650 battery1 x Retail Box