In V2’s own words
Pair your favorite wax, oil, gel or similar concentrate with the top-rated blank on the market. The EX Blank for Wax combines the capabilities of a personal vaporizer with the convenience of a microcig, delivering unparalleled performance and versatility. This blank cartridge is fully compatible with the entire line of V2 Classic and EX Batteries, so you can enjoy it with any V2 Battery in your collection.
A fairly straightforward device, offering some important versatility to V2’s respected batteries. A great way to get an affordable, yet interesting, experience out of a simple setup. V2 offers 3 of these for 9.95, which is spot on for what they are.