OBS ENGINE RTA features rebuildable tank with food grade 304 stainless steel and resistant quartz glass. It uses 5.2ml ejuice capacity and 25mm diameter. It adopts side filling and top airflow control, which shapes powerful DIY deck with 17mm. It innovates atomized seat unique and DIY chassis design, as well as temperature control, which can work at high wattage by reducing the heating delivery to the chamber and base from coil. With anti-leaking and high-performance, it will be more attractive and popular.