At the heart of each SFX is a microchip containing the real recorded train sounds and a small motion sensor which detects what the train is doing and replays the most appropriate sounds through the tiny loudspeaker.
Gaugemaster Sound Capsules: Bring Full Sound Effects To ANY Analogue Model Train
Train Tech SFX+ Sound Capsule - Steam Express Locomotive
Train Tech SFX+ Sound Capsule - Diesel Locomotive
TTSFX21 Train Tech SFX+ Sound Capsule Diesel Locomotive Continuous
TTSFX50 Train Tech SFX+ Sound Capsule Diesel Multiple Unit
Train-Tech SSFX70 SFX+ Sound Capsule Goods Freight Sounds
