Welcome to SmokShop's variable voltage and wattage mod page. Here you will find a selection of different styled devices, most of which can do both variable wattage and voltage. All of the above devices are essentially the same thing with a different shell, this allows each user to select the style of device to fit their need or in some cases fashion. Advanced mods either have a fixed internal rechargeable battery or require separate batteries. Some will require a separate charger but others allow you charge using a USB cable. Variable voltage and wattage mods are very well built and generally use either heavy or light metals which make them less prone to damage from knocks and bumps.