This vape kit by OBS sports an all in one design. In addition, it has an overall diameter of 20mm alongside a height of 112mm. The OSB KFB AIO also features an internal 1,500mAh battery, and can be charged using the micro USB port.
Also, it provides a constant voltage output of 3.5v, allowing for a consistent vape experience. Not to mention, it has tons of safety protections built in. It is user friendly as well since it does feature a simple single button operation.