The O.Pen is a high quality vaporizer battery that powers most of the popular cartridges found on the market today. It combines style and functionality to make it the best option for your oil cartridges. The O.Pen features a slim, sleek body that easily fits into pockets and purses and is perfect for on-the-go use. It has four different voltage variables, so it can handle thicker oil cartridges as well as ones with lower viscosity. The auto-draw feature makes it easy to use and so that if you put it in your pocket, there is no button to be accidentally pressed. Comes with a screw-on USB charger for easy charging. Grab one of these awesome pen-style batteries today! Backed by a lifetime warranty!