If its the same as mine...
Big button arms and disarms as above.
Little button does the panic and sensor thing.
To turn the sensor off, press the big button to arm the alarm.
I seem to have to wait until the lights have flashed then press the small button
You'll hear a *beep* that means you can leave the roof off and the alarm won't go off constantly.
I read the manual for mine
Do these classify as CAT 1/2? I dodnt bother to tell my insurance about it, other than 'manufacturers standard fit'