first off, cheers zvhturbo for the manual link
Personally i think thaty clifford alarms are good, ive had 2 alarms in 2 cars, had the concept 600 for 2 years and the only problem i had was when it was first put in it got wet but it got replaced and its fine with a plastic bag over it!!

lamar69er, tried following wot you said and it didnt work so i read the manual and it said press the button on the left instead of the bottom button and that adjusted the internal sensor.

Didnt say how to adjust the external sensor though....
any ideas anyone?

my alarms been in for 2 years so maybe its a older version than yours lamar69er, anyway, thanks for the help!