Decoder for switching on and off continuous currents for light signals, driving current, lighting, motors or accessories. Compatible with Commander, Marklin Digital and Uhlenbrock Intellibox. Four independent and separately controllable switches 1xUM, each with a load capacity of up to 2 A. The coding switch for entering the decoder address is freely accessible from the outside (without cumbersome removal of the case cover). The control is possible by a separate ring line or directly from the track.