The iJoy RDTA 5S is the sixth generation model of iJoy's impressive RDTA line-up, retaining the innovative central top-fill design and two-post, dual terminal build deck while upgrading the airflow control system and the entire chassis. With most of the design elements inspired from the iJoy RDTA 5, the RDTA 5S measures 24mm in diameter in a compact structure with 2.6mL juice reservoir. The RDTA 5S is refilled through the central fill-port that leads directly into the glass reservoir, accessed via removing the top cap. An update is implemented within the two-post, dual terminal design, featuring a gold-plated build deck for effective conductivity. It works in synergy with the gold-plated 510 connection ensures great connection, with spacious chamber clearance for high-power configurations. The terminal openings are secured via side and top mounted Phillips screws for larger thread points and more secure attachment. The wicking assembly deploys a convenient access, in which users can unthread the mid-section of the tank to access into the reservoir and set-up the coil leads and wicking materials. Airflow is highly dynamic on the iJoy RDTA 5, implementing a dual airflow system for a truly versatile experience. The primary bottom airflow enters the chamber through dual exterior airslots that feeds into two internal air tubes. The secondary airflow features a wide slotted airflow on each side of the chassis, throttled via the knurled top cap.. A creation that tailors towards advanced users with functionalities that caters to amateurs, the iJoy RDTA 5S is a worthy flagship product.