Zelos, a compact and ergonomic vaping mod from Aspire powered by a 2500mAh built-in Li-Po battery. Wattage can reach up to 50W. It has variable voltage and wattage settings. In addition to its precise TC settings, the new firmware ensures its wattage can also be adjusted under the TC mode, with all that together added with a stylish design, makes the Zelos a smart choice for your vaping needs.The Nautilus 2 is a 2ml mouth to lung tank and fits the Zelos perfectly. With interchangeable coils and other Nautilus coils allows you to personalize your coil/cloud producing preference.