Lit Kit is a Twist VV Wax Pen Kit that features compact and discreet size. It is driven by a 400mAh built-in battery with convenient built-in USB charging port. And it allows you to adjust voltage from 1.8V to 4.2V via a dial, meeting your different vaping needs better. In addition, it comes with 10sec preheat function that will prepare your materials before use. Besides, equipped with LED battery indicator light, it displays you the battery level clearly. Moreover, with a magnetic adapter, the Yocan Lit can safely and securely fit most 510 threaded thick oil cartridges from 9mm-11.5mm in diameter. Last but not least, it is compatible with the QDC coil that provides you with the purest experience and also guarantees a crystal clean and smooth vape.