Open system electronic cigarette, Hannya Nano Pro by Vapelustion. It is made of Zinc Alloy and plastic. It comes in 2 color, black and white. It has 4 magnetic metal panel that is easily replaceable. 2 empty cotton cartridge with 2ml capacity for vape liquid. When filling the new cartridge with liquid, let the cotton shook the liquid for 1-2mins before using it. While vaping, use mouth to engulf the cartridge and inhale. Do not place lips on the edge of cartridge as the heat may cause scalding to lips.