The Vapor flask offers a refreshing look and feel from the standard box mod. Known as 1 to 1 it is the exact same as an authenic. The steel construction and curved look offers a very comfortable feel in you hand. The flask has the firing button on the side, just in the right place for easy access. The wattage and voltage adjustment buttons are flush on the front of the Vapor Flask. On top is the 510 connector and a small but very readable LCD screen to display wattage, voltage, and ohm readouts. The Vapor Flask takes two 18650 batteries.