ESU 50010 ECoSBoost ext. Booster, 4A H4-Booster with 4.0 A continuous-load output. Outputs short circuit proof. Thermal overload protection. Galvanically isolated ECoSlink connection. Integrated NMRA DCC BiDirectional feedback detector with cutout device. Integrated mfx¬ feedback device (enabled only when used together with Mí_rklin¬ central station¬) Operational modes To use with ESU ECoS or Mí_rklin¬ central station¬. Supported protocols (depends from command station): NMRA DCC, Motorola¬, Selectrix¬, mfx¬ Dimensions LxWxH 180 x 76 x 40 mm (7.09 x 2.99 x 1.57 inch) Included in delivery ECoSBoost with 4.0 A continuous-load output, power supply 18V/5A/90VA, output voltage adjustable from 15V - 21V, terminals for track- and programming connection, extensive instruction manual.