3 groups The machine is clean, maintained, and cleaned daily. Features: Equipped with two group heads and 2 cool-touch steam wands even during use for maximum efficiency. Volumetric control pump for high and stable pressure under all conditions (79.3 US gallons - 300 liters/hour). Separate settings for each group head via touch. Pre-infusion and active flow system for precise control of water flow and coffee pre-infusion time. Group heads, coffee filters, and boilers are made of AISI 316L steel. Specifications: Voltage: 220V Power: 8350W Steam boiler capacity: 10 liters Coffee boiler capacity: 1.5 liters Country of origin: Italy