FUCIG S1 Beginner Starter Kit is designed for the newbies, which do not want change the batteries often and like the box mod style. FUCIG S1 is 2200 mah with battery built-in. Micro-USB charger method, you can vape as well when you charge it. The Tank of it is 2ml, with changeable coil heads. Great Flavor and test. Air flow can be adjusted with the AFC. Support 5W-85W power output. OLED display, clearly show you the ohm, voltage and power.