Class121/122 Sound Decoder And Speaker (21) Dapol O Gauge Model Only

We have tested this decoder in the Dapol class 122 o gauge model, Please note this decoder is only for the Dapol O gauge Model and Not the OO Version! Below is a list of the Function keys and their assignments applicable to this model. F0.Directional Lights on /off F1. Sound on/off F2. Horn 1, two tone F3. Horn 2, Two tone F4. Single horn F5. Double Door slam F6. Singe carriage door slam F7. Guard Whistle F8. Guard Driver buzzer F9. Flange Squeal F10. Rail joint Noise (Changes with speed of train) F11. Seagull F12. Shift Mode 1 F13. Acceleration F14. Switching Mode F15. Cab lights linked to direction of travel F16. Internal lights