Alarm principle:

1.Human design: voice prompt for reminding you to anti-lock the door.

2.Anti-technical opening:twice vioce prompts and then make alarm .

3.When meeting violence opening by Tommy bar,Jack,Cutter,etc.to Prevent forcibly opening,the lock will signal the host machine,and the host machine dail up the phone numbers set in

adance to note hosts.then the lock make alarm .

4.You are suggested to choose PIR,window sensor,smoke detector,gas detector to make the alarm system perfectly.