It’s slim, portable, and extremely effective. The all new SkyBlue Essential is just what you need for vaping all your favorite oils! This is our most user friendly product to date with no buttons to press or temperatures to set. Everything you need is included in your travel case to get you vaping oils right away! You can fill our patented Terp Cell™ cartridge for use with your own oils or you may attach a pre-filled 510 thread cartridge of your choosing. The SkyBlue Essential battery is compatible with most 510 thread cartrdiges. Some exceptions may include oversized 1ml cartridges.