The Hornby TTS (twin track sound) decoder offers a great alternative for those modellers that would like to add sound, but at a more affordable price. Our TTS decoder offers a minimum of 16 realistic sound functions, With many specific to the chosen model. These can include whistles, horns, start-up, idle, cold start, in motion sounds and many more. The decoder also possesses all of the features attributed to our popular R8249 decoder.