The EHPro Atomic RDA is a relatively small, yet awesome-looking rebuildable dripper. The top cap has 3 pieces, and features adjustable airflow. It functions much like the EHPro Trident v2. To adjust the airflow, remove the top piece and the ring. Then, line up which airholes you'd like to use. Next, replace the ring appropriately and secure everything in place by screwing down the top piece. The Atomic has 3 posts for easy dual-coil builds. This is a fairly straightforward dripper with adjustable airflow, huge airholes and 3 posts. Also comes with a stainless steel wide-bore drip tip, so no liquid will get in your mouth when lung-hitting!