The Airistech Airis Mystica II Mod is a special shape device. It is powered by a built-in 450mAh battery with voltage regulation function. The atomizer (not included) is easily connected and blocked by a small magnetic adapter. The designed oil window is designed to check the oil capacity at any time, no longer need dry heating and burning taste. The hole diameter is 12 mm, which makes it compatible with most cartridges on the market.