Sorry I don’t have a link. My ones are about 100ft.
But, I have had several of these in the past. They are the dogs!! 
It’s a remote start car alarm with pager, so it lets you know if someone try’s to break in to your motor. Also if it’s cold outside you can start your car from the comfort of your bed.
However, the best part is, it’s range is about 1-1.5km’s:D and it has a trunk release button!! So you simply connect your Horns up to the trunk release terminals and away you go. You can’t do a continuous blast as it only operates for about 1-2sec’s, but that’s enough!! 
I will be installing another one soon
