i am electrician and work for myself , i often get asked if i can fit an alarm but most of time i turn them down so i bought a system and just played around with it
i had no real issues with it except the ones above ie not sure if the bell box has to be set to sab or scb with just one bell . and im also unsure what the going rate is to fit and install a system on a customers house
hope thats a bit clearer
thanks