... 4.PIR sensor+detect GSM wireless home security alarm G121.8 wireless zones 2.Intercom function 3. ... zones( 1 wireless SOS zone, 1 wireless fire alarm zone, and the other 6 wireless zones can be ... Emergency function:you can press the button to alarm immediately in order to get help if in emergencies ... .15. Can send alarm signals to monitoring center through GSM network, such ...