作者: Gregory Hill
DOI:
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摘要: The mobile phone personal alert device, (PAD) is a self powered detachable component of phone. PAD can be carried separately by the owner. Electronic circuitry including low power matched transmitter/receiver fitted within both and PAD. If two units become separated certain distance, an audible triggered in units. are not reunited preset time, will advance to alarm sound, all services normally available that deactivated. sound emitted from cancelled way push button on base Various alert/alarm signals on/off functions accessed predetermined Pin keypad. When use, inserted back into purpose built socket shell body, enabling batteries recharged battery.