Reuleaux RX2 20700 TC VW mod is the updated version of Reuleaux box mod, is compatible with both 20700 and 18650 cells. Having a large 1.3inch display and easy-to-go interface, the RX2 20700 is capable of firing up to 200W with dual replaceable cells. Coming with a 1.3inch large screen, RX2 20700 presents all parameters in a more clear way. Also the dual separate battery bars allow you to know which battery needs to charged or exchanged.