Our hardware maintains some of the lowest failure rates in the industry and our cartridges are engineered for smooth and consistent airflow. In addition, our pens have multiple voltage levels so you can control your heat settings (low, medium and hot) and feature a pre-heat mode that allows you to heat the oil before you hit. our 710 king pen cartridge comes with a 710 king pen battery attach to it
710 King Pen Battery and Charger Kit
710 King Pen Battery. Universal 510 Thread. Works with most Pens. Silver. USB Charger included.