A stylish and sophisticated mod designed to fit perfectly in your hand. With a genuine Evolv DNA 40 chip, this device performs as good as any box mod and exceeds most in terms of looks. An ergonomic design, spring loaded 510 brass connector and 4 vent holes on each battery cover are just some of the features of this fantastic mod. Please Note: Most 18650 batteries will not fit this device. We recommend the LG 35A 2500mAh IMR Battery.