The Innokin GOs Pen Kit contains a 1500mAh built in battery. It comes with a USB charger cable and 2 x disposable 2ml tanks which have 'slide to open' top fill systems. The GOs kit operates by a single button and has an output of 13W which cannot be adjusted. 

To buy tanks for this kit click here: Innokin GOs Tank - Black – Vapro Vapes