The Discreet Vaporizer from The Kind Pen is the industries simplest ready to use oil vape on the market for the best price available. This device uses a temp controlled variable voltage battery allowing you to choose between 2.8, 3.3 and 3.7 volts. The well known 5 click on and off safety feature is installed on this vape therefore it works the same as all other vaporizer pens. The discreet also features a 0.8Ml ceramic wickless 1.8ohms glass tank. This device is designed to be used with eLiquids and/or essential oils. It also comes with a lifetime warranty, therefore if anything ever stops working, replacement parts will always be covered!