GWR/BR Dukedog class 4-4-0 sound decoder and speaker (21)

Description

Below is a list of the Function keys and their assignments applicable to this model.
F0. Lights on/off (where fitted)
F1. Sound on/off
F2. Long whistle
F3. Short whistle
F4. Buffer up
F5. Coupling up
F6. Injectors
F7. Drain cocks
F8. Safety valves
F9. Wheel/track ‘groan’
F10. Blowing off
F11. Carriage door slam
F12. Guards whistle
F13. Shunt mode – half speed
F14. Accel/Decel override
F15. Aux 1
F16. Long warning whistle
F17. Short warning whistle