Protac 5-X USB/Protac HL 5-X FlashlightDurable, anodized aluminum construction Anti roll head prevents the light from rolling away when placed on a flat surface Rubber sleeve provides thermal insulation and a sure grip The super bright 3,500 lumen full size ProTac HL 5 X flashlight is available two ways: A complete rechargeable system includes two of our new 18650 USB batteries with an integrated micro USB charge port, or it's available with four CR123A lithium batteries. This MULTI FUEL