On the contrary to most other applications that send alarm to friends, Great Security Alert normally sends the alarm to a response centre. The connection to the response centre goes through the Skyresponse system. Please contact Skyresponse to get a full list of professional response centers that support Great Security products. To be able to use Great Security, the user needs to have an account on Great Security server where the user has added their profile and the instructions that should be performed when an alarm is triggered.