The Exxus Snap Variable Voltage 510 Cartridge Battery gives you enhanced functionality in a compact and very stylish unit. It's both sleek and powerful. With the simple press of a button, you can select one of four voltage settings to define your perfect vape. Exxus Snap MOD Battery uses the 510 thread magnetic connector for vape cartridges, conveniently made in 2 sizes: short & long. The reason behind it is the length of the vape cartridge you may use. Smaller in capacity 0.5ml 510 carts will require a long magnetic connector for optimal setup and greater capacity, 1ml + vape cartridges are longer and will need a short magnet. Both connector types are attached.