GeekVape's Helix is a stylish single 18650 starter kit inspired by the form of double-helix. Built with high grade ultra-lightweight ABS material which increases impact and heat resistance. Three power output modes are available to match your personal preference. USB Pass-through allows you to simultaneously use the device while charging. The advanced AS chipset fires extremely fast and stable. The LUMI is a pre-coiled sub ohm tank that is powered with our super mesh coil system(non-replaceable) to produce best flavor and outstanding vapor production. Lumi tank is built with food grade PC and Stainless steel and only weighs 16g!