The Vaporesso XROS Cartridge features an adjustable airflow system, maximizing the effectiveness of flavor and nicotine satisfaction to cover vaper's needs. This visible pod helps quickly determine how much e-juice is left. And it is only one hand required for refilling. The visible pod helps quickly determine how much e-juice is left.You will enjoy the DL or MTL vaping with Vaporesso XROS Pod. The Vaporesso XROS Pod has 2ml juice capacity too. Each pack comes with 2 pieces of Vaporesso XROS Pods.