4 poles electrical motor (1450 RPM) with thermal protection and air cooling. Three ceramic coated pistons, brass linear pump head with built-in by-pass valve. Suction and delivery valves S/S. Built-in Detergent tank for indirect suction. Pressure regulator. Pressure gauge Glicerine. Hose-reel (optional). Accessory holder. Power cable holder. Ergonomic handle.