Easy to place and wire (diagram supplied with all the possibilities, keeping or not the original warning). Given its power (electric 240w consumption), you must use the supplied relay and not connect on fine son of the original alarm. Very efficient, it gives a sound type Mercedes, BMW etc. rather than his sharp Renault 4. So even highway that remains useful and audible. 2 tones = 1 output for serious + 1 output for the treble sound is so uniform, not a brass band.
