The ARO II is a bottom coil clearomizer tank system made by Smok Tech. The tank tube itself is made of plastic so it is very economical. Bottom coil clearomizers provide a nice warm vapor, with a superb clean flavor, and reduced wicking issues. The ARO II has a replaceable atomizer head and holds about 2ml of e-liquid. The ARO II has an eGo connector, but unlike most eGo clearomizers or cartomizers, the ARO II uses the outer threads of the eGo battery. Therefore, if you are using a device with a 510 connector it will be necessary to use a 510 to eGo adapter (sold separately). The center post of the connector is unsealed. There is a vent hole in the bottom of the tank which provides the right amount of airflow. Due to the design of the tank we have yet to have one leak. The rubber gaskets keep the e-liquid where it is supposed to be, in the tank wicking to the coil.
To fill the ARO: unscrew the bottom atomizer head, hold the tank upside down and fill with about 2 ml of eLiquid. With the tank mouthpiece-end down, screw the atomizer head back on. To replace the heating element unscrew the bottom of the clearomizer. The heating element unscrews from the base.
The ARO has great vapor. It comes with a 2.4 ohm coil installed and produces excellent vapor and a good throat hit.
The correct replacement coils for this unit can be found here.