The new battery sanders RTSC 400, DTSC 400, ETSC 125 offer outstanding mobility in work. The powerful 18 V Ergo battery with 3.1 Ah delivers the same performance as a corded model and gives the 1.4 kg lightweight machine unmatched ergonomics. Integrated dust extraction combined with the Longlife dust bag makes the machine easy to handle, allowing you to work comfortably overhead or in hard-to-reach places. For completely unlimited runtime, you can replace the battery with a plug-it mains adapter. Mobile and convenient: without cable or hose, with perfect ergonomics, low height, and a weight of only 1.4 kg. Performance comparable to a corded tool and maintenance-free with a brushless EC-TEC motor. Non-stop operation: with the 3.1 Ah battery that works longer than it needs to charge. The same machine both in the workshop and on-site – with the mains adapter, you choose whether to work with battery or cord. Dust-free and health-friendly: with the Longlife dust bag made of extra durable polyester fabric or in combination with a Festool vacuum cleaner. Minimal reworking: PROTECTOR for gentle sanding along window surfaces, frames, and door panels. Sand without a cord where there are no power outlets or where access is difficult (e.g., outdoors, on scaffolding). Work mobile if you find the power cable and suction hose in the way (e.g., on vertical surfaces, overhead, during edge sanding…). Ideal for vertical surfaces or for work above head height. One-handed sanding for small and narrow areas. Sand paint and varnish on window frames, door frames, and ceiling moldings. With the plug-it mains adapter, it functions as a sander with unlimited runtime in continuous operation – perfect in combination with a Festool vacuum cleaner indoors in Systainer SYS3 M 187