Updated PRO version of iMini V2 Cartridge Mod. Featuring a number of updates to the immensely popular iMini! The V2 PRO is a fantastic cartridge mod battery, the ultimate mix of function and size. The iMini V2 has a internal 500mAh battery, which is almost hard to believe considering its size. It adds variable voltage and preheat functionality while keeping the super simple single button operation. The color of the light will change to indicate which voltage level you are at; green is low (2.9v,) yellow medium (3.4v,) and red high (3.8v.) The iMini V2 can be charged with the included micro USB charger.