The Innokin Coolfire Mini Starter Kit includes the Coolfire Mini and the Zenith D22 MTL tank in a ultra portable starter kit. The Coolfire Mini features the same maximum 40 watt output and shape as the original Coolfire 4 without the bulky size. The Coolfire Mini features a built-in 1300mAh battery with a high quality and bright OLED display screen. The Coolfire Mini may be charging via the included micro USB cable. The Innokin Coolfire Mini is functional, stylish, and portable at the same time catering to both beginner and veteran vapers.