Reuleaux RX300, another masterpiece designed by JayBo, impresses us with four replaceable 18650 cells and 300W high power output. Having 0.96inch OLED screen, RX300 supports various modes as well as custom logo and preheat function. In addition to the fashionable colors and changeable stickers for your preference, the upgradeable firmware also makes it popular and up-to-date. 300W Maximum Output with Four 18650 Cells: Powered by four replaceable 18650 cells, the maximum output can reach 300W, providing you with a huge amount of vapor.