Emergency communication device for personal use, includes voice modulator, loudspeakers, support, microprocessor, dual tone multi-frequency module, and radio frequency signal receiver module

摘要

The device has support, microprocessor associated with a push button, RF signal receiver, a voice modulator, a dual tone multi-frequency (DTMF) call tone generator/receiver module, several LED indicators and a loud speaker. The device is connected to a telephone line through a module adapted to the line assigned to the voice modulator, DTMF module and a telephone line connection.