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The ARO-v2 is a bottom coil clearomizer tank system made by Smok Tech. Bottom coil clearomizers provide a nice warm vapor, with a superb clean flavor, and reduced wicking issues. The ARO-v2 Pyrex has a glass tank, replaceable atomizer head and holds about 2.5ml of e-liquid. The ARO-v2 has an eGo connector, but unlike most eGo clearomizers or cartomizers, the ARO-v2 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 (Not included). 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.
To fill: unscrew the bottom atomizer head, hold the tank upside down and fill with about 2.5 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-v2 has great vapor. It comes with a 2.4 ohm coil installed and produces excellent vapor and a good hit. This is sure to be a huge hit.
http://www.happyesmoker.com/Smok-Tech-ARO-v2-Pyrex-Bottom-Coil-Tank-FBC_p_145.html