... ID , ADEMCO 4+2 Express, ,3/1,4/1 communication protocols, adding Caller ID support. The receiver can work majority ... events, SMS sending and forwarding. Telephone line status display. Two-way voice communication...etc. Compared to others manufacturer, we provide the free ... 10-40BPS) Caller ID.Built-in LCD to display the data time, alarm events.Can automatically store 300 alarm records, works ...