Elegantly designed with only 2 components that screw into one another. One-step cartridge replacement: Unscrew battery from old cartridge and screw in new one. The atomizer is integrated into the disposable cartridge along with the nicotine pad, and is renewed with each replacement. The nicotine pad is built into cartridge: You never need to touch it, and it never leaks. Green Smoke™ offers a quality Electronic cigarette with disposable cartridges. Their E-cigarettes produce the highest smoke volume in the industry. With a variety of flavors and nicotine levels, Green Smoke's™ patented electric cigarette technology offers convenience and performance that is unmatched. Green Smoke™ products have been independently tested for safety. Green Smoking is your best alternative to tobacco; Smokeless E Cigarettes!