MUST BE 18 TO PURCHASE. Designed in USA made in china. Borosilicate Glass Mouth Piece.2 in 1 : For solid concentrates and oil cartridges. To use for oils remove atomizer and replace with 510 threaded cartridge. 3 Temp Battery w/ Pre-warm/Sesh. 2.7v/3.3v/4.1v plus a 15 second prewarm/sesh function. No mater the cartridge or the concentrate, enjoy it the way you like! No corners cut, the mouthpiece is smoked boro for a clean appearance, the chamber is all quartz, and the body is stainless with a gun metal finish. The device is so easy to use the instructions fit on the box. Additionally, we took the extra step to build the charger into the battery, so no more goofy USB adapters.