SMOK G-Priv Kit is powered by dual external 18650 batteries (not included) so that the G-Priv can support a maximum 220W power output. The big 2.4" TFT touch screen and screen lock button will simplify vaping operation and give you easy time. And the lateral big fire key provides you with good hand feel and smooth visual effect. You can operate the G-Priv Kit just like using a smart mobile phone. TFV8 Big Baby works well with G-Priv 220 Mod and forms up G-Priv 220 kit. The G-Priv kit will bring better vaping experience to you.