The OG Ooze Slim Twist Pen has been our best-selling vaporizer battery of all time, so we decided to take all the best features and totally revamp the device. The Twist Slim 2.0 is decked out with tons of new features and a sleeker look. 320mAh capacity Variable voltage output - 2.0 - 4.0v Prep mode - pre-heat cartridges 510 universal threading 5 year warranty USB charger included