2-3 group espresso machine Communication with the grinder via patented serial cable connection Patented multi-boiler technology Hot water and steam boiler: 7.5 liters Coffee water boilers: 0.5 liters Volumetric dosing, flow rate control It can dispense coffee in grams per second with the help of mechanical and digital adjustment 54 mm and 58 mm diameter porta filters can be used 2 standard hand-free steam wands and 1 standard hand-burning hot water tap