This personal protection system was designed by NHDS for a client requiring a secure means of monitoring VIP's at a distance. The person being monitored would be provided with a small handheld “panic” button which would communicate with a monitoring transceiver located nearby (in the house or vehicle of the client). This transceiver would then report to the central monitoring station using the MOBITEX public data network. Should the panic button be pressed or the device move out of range of the transceiver, the central station would be notified immediately. The central station was able to handle a large number of transceivers and to interrogate each of them on request.