The 510 Thread VapePen Variable Voltage Vaporizer Battery is a new level of convenience! The variable voltage battery allowing you to choose your preferred voltage by just clicks of the battery. The VapePen is available in a number of different colors to ensure that it will look great with any attachments you have, as well as match your personality. Included is a USB charger for convenient charging of your battery, simply plug it into any USB slot or USB enabled wall charger. With the button battery, you have full control and maximum power for the ideal vaping session every time!