BR class 60 sound decoder with speaker (21)

Description

Below is a list of the Function keys and their assignments applicable to this model.
F0. Lights on/off
F1. Sound on/off
F2. Double tone horn 1
F3. Double tone horn 2
F4. Single horn
F5. Notching up
F6. Notcting down
F7. Flange squeal
F8. Spyrex air tick
F9. Wheel/track ‘groan’
F10. Shunt mode/half speed
F11. Acceleration/deceleration over-ride
F12. Aux 1
F13. Aux 2
F14. Buffer up
F15. Coupling up