The Mi-One is an ultra-stylish all-in-one device. With an 1100mAh integrated battery and a 3.5ml tank, this is a simple device to get you started. The unregulated direct-output voltage operation makes using the Mi-One as easy as pressing the button. No settings, no hassle. Featuring a top-fill system, top airflow control, and a child-proof lock system, the Mi-One is a compact, easy-to-use starter kit whose unique designs make it a guaranteed eye-catcher.