Caliburn AK2, the 2nd generation of Caliburn KOKO, features its appearance & shape which is cute as a biscuit so that you can use single hand to top-up. It uses the previous Caliburn A2 Cartridge which adopts top filling system & visible window. 2 pods come in this kit.  Built-in FeCrAI UN2 Meshed-H 0.9 Ω Coil in the Cartridge  can provide you authentic flavor. Moreover, the device uses 520mAh built-in battery and supports simply direct vaping.