The Eleaf iJust X is an all-in-one starter kit that is designed for both beginner and advanced vapers. The Eleaf iJust X features a huge built-in e-liquid capacity of 7ml that is powered by a long lasting 3000mAh internal battery. The iJust X utilizes a simple one button design that is easy to use. The iJust X features a top fill design with a screw off cap. The leak resistant e-Liquid inlet system helps minimize leaks and maintain cleanliness. The Eleaf iJust X features a side micro USB charging port which may be charged with the included micro USB cable. The Eleaf iJust X is compatible with the majority of the Eleaf EC atomizer heads for a wide variety of coil choices.