The decoder is loaded with Olivia's Trains excellent class 37/4 sound project. The sound specification features sixteen different sound functions to include 3 different horn sounds along with shunt mode and directional and independent front and rear lighting. A short video of a similar 37 in action can be found here.
Further information for this model can be found here. Please see my other listings for different liveries of this locomotive, signals, lights DCC items and more. Examples of our work can be found on Youtube, search for crsignals. The item "371-171 N GAUGE FARISH CLASS 37421 COLAS WITH DCC SOUND" is in sale since Tuesday, October 10, 2017.This item is in the category "Collectables\Model Railways & Trains\N Gauge\Locomotives". The seller is "cr_signals" and is located in Rotherham. This item can be shipped worldwide.