why would you want to unlock your car from 1.5km away?
let alone 5m?
5m is enough isnt it?

reminds me of this comedy sketch
these 2 guys are having a comp on who can unlock their car from furthest away
the first guy presses his alarm from about 20m and nothing happend and hes like 'shit'
the second guy looks all smug and presses his alarm and his car unlocks...
and then a guy jumps in his car and drives off

long distance alarms arent all good lol