... 3calls on alarming 4.PIR sensor+detector Manufacturer of GSM alarm G121.8 wireless zones 2.Intercom function 3.3SMS, ... You can connect wireless emergency button, wireless PIR sensor, wireless door/window contact, wireless smoke detector, wireless gas leakage detector, wireless glass ... . Wireless Emergency function:you can press the button to alarm immediately in order to get help if in emergencies.15 ...