Ensure your decoders are working perfectly before installation with the ESU Decoder Tester (New Version). Designed for all scales, this tester supports a wide range of interfaces including 6- and 8-pole NEM sockets, 21MTC, PluX22, and Next18, while individual terminals accommodate decoders without connectors. A quality coreless motor with flywheel lets you check low-speed performance, and LEDs monitor motor direction, headlights, and AUX1–AUX6 outputs. Built-in 20mm speaker allows testing of LokSound decoders, with selectable impedance for flexibility. Two SUSI plugs enable testing of optional modules, and connectivity to your command station or LokProgrammer is simple via removable terminal block or solder points. An optional extension board allows testing of large-scale decoders, making this Profi Decoder Tester a versatile and essential tool for any model railroad workshop.