We supply no instructions with these as there’s only two controls and a push switch for the whistle plus an off/on switch complete with screws for mounting.
The Controls work as follows. Both turned fully counterclockwise and just quiet stationary steam can be heard. Increasing the volume control slightly and the unit starts to chuff , adjusting the other control increases the speed of the chuff thus by a combination of both you can get from just a hiss to full speed .
This unit has an electronic tone whistle which is ideal for a quick tot tot.
Sadly this unit cannot be programmed with one of our real whistles
You can however purchase one of our stand alone units these will cost extra and can be heard & purchased by clicking here
This unit is quite loud and by careful fitting of the speaker will give enough sound for a small to medium 00 layout or a big n gauge.