The Devilkin is the latest dual 18650 kit from SMOK that includes the TFV12 Prince Tank for all your cloud-chasing needs. They've slightly changed the design of the fire mechanism by adding finger grips and moving the fire button to the other side. Just squeeze the device, using the palm of your hand to fire it up. Another nice addition is the locking mechanism on the battery door, making it much more secure than previous SMOK mods, such as the Alien 220 and ProColor. The Devilkin Kit is available in a multitude of colors, including; red, silver, gold, rainbow, blue, and purple. All with matching Prince tanks!