This type of Burglaralarm has a city line and a SIM. Significant improvement over version 207 In this version of Fire Alarm, Fayostar sells the complete combination of Alarm and Fire Alarms and Traffic Control. Note that this alarm model has all the features of the 207 model. tip : Notice that most strangers with alarms have a little more and a little less, so what makes alarms different? This question is explained in the training section on the difference in performance of alarms.