The Wismec Reuleaux RX2/3 Box Mod by Jay Bo Designs follows the original design of the RX200 series and adds the unique ability to have a dual or triple battery configuration (sold separately). A dual battery back cover is included which allows for a much more compact size. The RX 2/3 can fire up to 150 watts in a dual battery configuration and up to 200 watts in a triple battery configuration. The RX2/3 features a much larger and clear OLED display screen. The user friendly OLED display screen also now features a switchable battery indicator which allows you to choose from a percentage or a battery life bar indicator. Temperature Coefficient of Resistance (TCR) mode is also now available for use as well. Designed by Jay Bo, the RX2/3 utilizes the Reuleaux design with the triangular shaped chassis, creating a svelte form factor that integrates three 18650 batteries in series. The lockable battery back cover allows you to switch to a dual or triple battery configuration with ease. The RX2/3 features the same recessed control face as the Reuleaux, providing a sleek and organized face while improving ergonomic feel and handling.