eGo AIO Pro, being all-in-one style, attaches the best anti-leaking structure with 4ml e-juice capacity. It is powered by a built-in 2300mAh battery. E-juice filling can be easily achieved simply by removing the top cap and injecting into the side holes. The improved airflow control system also brings large air inlet. It is simple and convenient in use, but fashionable in look of several mixed colors and indicator light of seven colors. Its simplicity and efficiency make eGo AIO Pro quite popular and unique.