The first of its kind! Breezy has a variable button control voltage including four individual temperature settings(2.8v, 3.2v, 3.6v, 4.0v), plus a chamber preheat setting. The chamber preheat setting warms the entire chamber, as opposed to more common devices that only preheat the chamber from the coil connection at the bottom. The chamber measures 11 mm in diameter, large enough for any 510 thread cartridge on the market (except CBN or FTP cartridges). The Breezy also comes with 2 different sized adaptors, one for a .5 gram cartridge and the other for a full gram cartridge.