These will be in stock soon. 

The TSU-Big Steam is our first web-exclusive decoder available in 3 board formats. This decoder features a true UP Big Boy recording! Previously this sound file was only offered in Athearn factory installed decoders, but now you can get it at our web store. This decoder is available in 3 board formats: TSU-1100, TSU-2200, and TSU-21PNEM8.

You will also get all of the features that you know and love from our Tsunami2 decoder line including: Reactive Dynamic Digital Exhaust, Functioning locomotive and train brakes, injectors, power reverse, and firebox flicker. We also offer a large selection of selectable sound effects including: bells (12), Whistles (90+), couplers, dynamos and more!

This micro 1-amp, universal-style format is ideal for small models with minimal space. It includes an optional capacitor or can be wired to a CurrentKeeper (SKU 678-810140 or 678-810160) to maintain performance over dirty track and switches.