BR class 158 Super Sprinter 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
F1. Sound on/off
F2. Horn 1
F3. Horn 2
F4. Doors opening
F5. Guards whistle
F6. Doors closing
F7. Driver/Guard buzzer
F8. Flange squeal
F9. Shunt mode
F10. Acceleration/Decelleration override
F11. Aux 1
F12. Aux 2
F13. Reverse gear clunk