You can add the Decoder Tester Extension to your 53900 ESU Decoder Tester:

This is a Plug & Play unit, no soldering required, just plug into the side of the 53900 Decoder Tester , where it enables you to comfortably test all large scale Lok Sound & Lok Pilot L & XL-Pin decoders.

You can plug in LokSound XL-Pin decoders with multi-pin connectors as well as LokSound L decoders for easy testing.

There are Screw terminal connections for connecting the standard ESU XL Screw tape decoders.

The extension module has also 12 LED lights to monitor and display the status of all physical function outputs.

You may also plug on a second speaker or sensor inputs onto the multi-pin connector for quick and easy testing.

Up to four servos may also be plugged on for direct testing.

Especially for the LokSound L, connecting pins for a smoke generator have also been added.

The 53901Decoder Tester Extension represents the perfect test and programming bench in conjunction with the 53900 ESU Decoder Tester, where you can test ament, reprogram all ESU decoders quickly and easily.