The La Spaziale S1 is a Single Group with a Double (dual) Boiler with a rotary pump. The S1 is a direct plumb commercial quality espresso machine for the home. Features Dual Boiler Steam Boiler 2.5 liter Steam Boiler Element 1250 Watts Group Boiler .45 liter Group Boiler Element 800 Watts Swivel Steam Arm (Not shown in Picture) Two Complete Portafilters One Single and One Double Direct Plumbed Rotary Pump Volumetric Dosing Volumetric Dosing Adjustable Through Touch Pad Group Tempe...