... Users can make calls by using keypad on alarm panel, just like a telephone;n One-key-control ... gas, door, hall, window, balcony, and perimeter places alarm;n Real-time, delay, 24 hours, bypass defense ... Users can make calls by using keypad on alarm panel, just like a telephone;n One-key-control ... gas, door, hall, window, balcony, and perimeter places alarm;n Real-time, delay, 24 hours, bypass defense ...