Really stuck with either Bosch or Ness BTW Bosch do not make the alarms it is contracted to a third party. And Hills do not make alarm systems, these are imported.

Correct me if I am wrong, but that GSM unit requires a SIM Card? The devices security companies use do not need the end user to maintain a sim card and come with smart phone control.

Hardwired is always better No batteries to change, no range issues Use a security installer not an electrician, security installers need to be licensed in most states, so check as each state has its own requirements.

BTW - Hills is not the manufacturer, the Hills alarms are rebranded products originally made overseas. Ness Alarms are one of the last Australian Manufacturers of alarms with Bosch, however Bosch alarms are not made by Bosch but a third party.