Inookin Coolfire 4 Box Mod features maximum output wattage of 40W and max output voltage of 7.5V. It will work great with sub-ohm tanks since it can handle resistance as low as 0.3ohm. As for the iSub Sub-Ohm Tank, it can hold up to 4.0ml capacity of e-liquids and comes with 0.5ohm coil. the CoolFire IV fires a full range of tank resistances and each is made with the highest quality materials to create a vaporizer that you can rely on!
