size 1 means US Chargersize 2 means US Charger+EU AdapterType of LED : CREE XM-L2 LED Output brightness : Can come to above 1200 lumens [lm] Internal wiring applies the high efficient booster circuit， working voltage is wide and can utilize the batteries in the largest extent. Waterproofing design Material: High quality iron. Switch: Press middle switch button on/off 3 switch Mode: high / low / strobe weight:725g Package Included 1 x CREE XM-L2 LED lamp+3*4200mAh 18650 battery +1*charger