The Quick Mill 0992 QM 67 is a dual boiler. Despite the vibration pump, the noise level is very pleasantly quiet thanks to the built-in ′′Pulsor′′. Furthermore, a shot timer is integrated. The PID control allows you to control the respective temperatures in the boilers separately - visible on the double manometer. The expansion valve allows the brewing pressure to be adjusted/regulated from the outside in order to perfectly adapt the aroma to your taste.