... alloy reflector;Material: High quality Aluminum Alloy. Durable aircraft-grade aluminum makes this flashlight sturdy and durable;Life ... Normal Brightness / Flashing /Zoom In & Zoom Out; Model of Battery required: 1 x 18650 Battery; Environment: everyday carry, camping, hiking, night riding, ... pressure exceeds 3.6vV, let the positvie pole of battery forward otherwise will burn out board, should pay ...