Hornby Railways R8107 TTS Sound Decoder for Gresleys' Streamlined A4 Class 4-6-2 Pacific Locomotives
Hornby will be releasing the TTS sound decoders separately, expected summer 2017, so that non-sound locos can be equipped with the TTS decoders supplied with Hornbys' sound fitted locomotives.
This decoder is pre-loaded with the sounds for the streamlined class A4 pacific locomotives such as the Mallard.