The Go Z kit optimized output and 1500mAh battery create great flavors that last all day. Features a tri-color battery capacity indicator, and the integrated protections to ensure battery safety you can rely on. The GO kit automatically adjusts wattage output, depending on the coil used (1.6ohm: 13W / 0.8ohm: 16W ). Turn the bottom airflow ring to fine tune your perfect draw and enjoy a truly great flavor experience! The GO Z refillable 2ml tank is designed for flavour, convenience and affordability. Simply push to slide the top cap open and fill the 2ml tank with your favourite eliquid. A silicone seal located on the the top of tank prevents leakage when refilling.