Rocket Espresso's answer for cafés the world-over, the R9 automatic espresso machine offers a design dedicated for individual control of each brew group. Each group head has its own 1.9-liter brew boiler, variable temperature PID, shot timer, and automatic control cluster. Supporting this granular system is a massive steam boiler equipped with sensitive pressure transducers that help reduce recovery times for your busiest mornings. Of course, the service-ready design of the internals come wrapped in Rocket Espresso's sturdy polished steel casing.