SMOK BRIT One kit includes 2 version, mega kit and mini kit. BRIT One Mega Kit consists of Brit Sub Tank and Misub Plus battery with build-in 2000mAh battery. It is powerful and durable. With the BRIT One Mega Kit, you can enjoy cool vaping and huge cloud storm. BRIT One Mini Kit consists of Mini Flavor Tank and Misub battery with build-in 1600mAh battery. It is powerful and durable. With the BRIT One Mini Kit, you can enjoy great flavor.