The Invoke is the latest APV from Eleaf. It's a dual 18650 powered 220W MOD with featuring temperature control. The 510 connector for the tank is center-mounted prividing excellent balance and usability in either hand. An additional bonus of the center mounted tank is the ability to handle tanks up to 27mm in diameter with NO OVER-HANG! The large 1.3-inch display make controlling and monitoring the MOD a breeze thanks to the intuitive user interface.