The Yocan Wit is a portable palm sized 510 cartridge device! The wit can safely and securely hold 510 cartridges between the size of 9 - 11.5 MM. Your cartridge will stay firmly attached to the Wit by the magnetic 510 tread adapter. With the 10 second pre-heat function, and 3 different power settings, you will be able to fine tune your cartridge vaping experience. The Wit has an internal 500 mAh battery that can charge full in 30 minutes!! So you can spend more of your time vaping then charging the device.