These units simulate electronically the sound of a British style two-tone diesel horn, and are specifically intended for use in a 24V dc ride-on loco.

The horn is triggered manually by operating a push switch, Controls are provided for pitch and duration of each of the two notes, and overall volume level is adjustable.

Once triggered, the first note is sounded, followed by the second note. The adjustment presets allow you to set a low-high setting, or a high-low setting as required.

Controls are provided for: note 1 duration, note 1 pitch, note 2 duration, note 2 pitch, and volume.

Supplied with a 102 x 102mm speaker.

Board dims: 110 x 60 x 28mm.

Power source: 24V dc.