Advice needed On This New Horn

[verba1]

Halfords have stopped doing the Stebel nautilus compact Horn so i was searching around and found a new model the new Ultra Compact Stebel Nautilus compact horn .

The original horn has two wires going into it . On the new stebel nautilus it says in the description that it needs only one wire ?

Does anyone know if i can fit it using the existing wires from the car ?

[joust]

I'd imagine it grounds to earth through the mounting bracket.

Speeding.co.uk and many others have the orginal still in stock.

J