Class 31 LokSound 3.5 Decoder Manaual 27 August 2020 15:22 Updated Class-31-LokSound-V3.5.pdf 2 MB Download Related articles ESU LokSound 3.5 Instruction manual Class 31 TTS Sound Decoder Class 20 TTS Sound Decoder HSS 377 Hunt Class Railroad D49 HSS 439 Class 31 2018 Onwards