Constant convenience is provided by the lock on button. Ideal power-weight ratio: Provides the highest power-weight ratio at 1.7kg, 620W. Highest cleaning efficiency: 620W combination power and 3.5m3/min airflow. Simple serviceability: The carbon brush is simple to replace. Ideal power-weight ratio: It has the highest power-weight ratio in its class, with 620W at 1.7kg. Highest cleaning efficiency: Provides a power of 620W and an airflow of more than or equal to 3.5m3/min. Simple serviceability: Changing the carbon brush during service is simple.