The EHPro Hobo RDA is a compact dripper that holds lots of juice! The deep drip well and removable wall make it easy to build coils and allows a large juice capacity. The dual-terminal positive post makes building dual coils extremely easy by allowing each lead to attach to it's own terminal. The top cap overlaps the inner wall by large margin for a compact design. Adjustable airflow on the sides and the top allow you to achieve your perfect airflow. The air holes on the top create a vacuum effect that produces bigger clouds. The EHPro Hobo RDA comes with an Allen key for the terminal screws, extra O-rings, and extra screws.