The new RTSC 400 battery-powered compact sander provides unique mobility and freedom of movement when working. The powerful 18 V Bluetooth® Ergo battery with 3.1 Ah guarantees performance like from a power outlet. And is the key to an extremely compact design with balanced weight distribution and perfect ergonomics at a weight of only 1.4 kg. The self-extraction in combination with the long-life dust bag allows flexible handling of the machine - low-fatigue even overhead, vertically or in hard-to-reach places. The Bluetooth® battery ensures uncomplicated working in combination with a Bluetooth®-compatible Festool extraction mobile and ensures that the vacuum cleaner starts automatically in AUTO mode when the battery grinder is started. The battery can be exchanged for the plug it mains adapter for unlimited running time - ideal for stationary use and also in combination with a Festool mobile suction unit.