Discussed this yesterday with some High police officials.
They are also impressed with this.
In fact we have been considering an improvement ::
In large buildings and Gated community developments, an ALARM system - similar sound resembling POLICE SIREN can be also designed and installed and could be acvitied by a remote key like this !!
Am sure this suggestion with the top seat of TN Police through Chennel.
This is handy. Remote key for Cars in case of emergency will be useful.