Mobile and fatigue-free: cordless and hose-free, with perfect ergonomics, low height, and only 1.4 kg weight. Powerful: The 18 V Ergo battery pack combined with the brushless EC-TEC motor delivers performance like that of a plug-in device. Continuous operation: thanks to the 3.0 Ah capacity battery pack, which runs longer than it takes to charge. Unlimited runtime: For electric continuous operation, the battery pack can be swapped for the Plug-it mains adapter (included in the set and available as an accessory). Dust-free and healthy: With the Longlife dust collection bag made of extra durable polyester fleece or in combination with a Festool mobile dust extractor. Less rework: Protector for gentle sanding along window surfaces, frames, and fillings. Comfortable dust extraction: The battery pack communicates via Bluetooth with the Bluetooth module of the Cleantec mobile dust extractor (retrofit available for CT 26/36/48, directly integrated in CT MINI I and MIDI I) and automatically starts the dust extractor when the battery sander is turned on. The new battery compact sanders ETSC 125, RTSC 400, DTSC 400 provide unique mobility and freedom of movement while working. The powerful 18 V Bluetooth Ergo battery pack with 3.0 Ah guarantees plug-in performance and is key to an extremely compact design with balanced weight distribution and perfect ergonomics at just 1.4 kg. The self-extraction combined with the Longlife dust collection bag allows for flexible handling of the machine - fatigue-free even overhead, vertically, or in hard-to-reach places. The Bluetooth battery pack ensures effortless operation in combination with a Bluetooth-enabled Festool mobile dust extractor, automatically starting the vacuum in AUTO mode when the battery sander is turned on. For unlimited runtime, the battery pack can be swapped for the Plug-it mains adapter.