I have three large lock up garages, side by side which have mains but no phone line. I would like to fit an alarm, probably with an external and internal siren(s) activated by 3 pirs or door sensors. I would wish to know if activated so SMS obviously but the cheaper ones are suspect. Don't mind having to remove card and send a text every two months. Wireless is obviously simple to install but could be unreliable and as I live 10 miles away do not want any false alarms! Wiring does not phase me and can have the cabeling in a seperate garage from the installation. There is plenty of scope to hide the components and make them generally inaccessible. Can anyone recommend a suitable system and supplier. Thanks.