To all the gurus here, I've got a quick question:

I've just installed a new Mongoose alarm last week and the remote doesn't seem to work outside 5 metres. Is this normal?

I took the car back to the installer but he reckons it's normal due to window tints, car angle, standard receiver length bla bla bla and didn't want to offer a solution.

Now, is it possible to increase the range by myself and how?

Thanks in advanced!