Introducing the all new upgraded Vamo V6 20W. The variable wattage digital mod maintains the infamous Vamo V5 design with improvements that utilize key significance allowing to extend the unit in continuing to be a favorite. The first issue that has been improved is the connection pin. In previous generations, the 510 connection pin had some issues and went through changes until finally deciding on using a silver plated contact pin screw that can be adjusted using a flat head screwdriver. This will allow a wide range of atomizers to be used that may have various lengths. The second update is the battery spring located on the bottom cap, which is now silver plated as well for better conducitivity. The Vamo V6 still maintains the extended tube for using a single 18650, 2 x 18350 or one 18350. With the improvement of the chip, it is strongly recommended to use higher amperage batteries to support higher amperage/lower resistance coils . The chip has some great novelty features as well. The OLED display screen can display volts, watts, puff count, atomizer resistance, output current and vaping time. Finally, another great feature is the ability to attach a USB adaptor that will allow you to charge USB related devices (adaptor sold separately).