The OBS Engine 100W kit is comprised of the vape industry's first replaceable battery sleeve mod and the Engine S tank, which offers a 2ml e-liquid capacity. Using a single 18650/20700/21700 vape battery (not included), the mod is capable of up to 100W output and is rechargeable via the included Type-C charging cable. The OBS Engine kit is compatible with the E1 and E2 coil series, and the kit contains an E1 0.4ohm mesh coils and an E2 0.2ohm mesh coil. Create the perfect vape experience by adjusting your settings on the 0.96-inch LED display screen.