Function Features.
1.Unattached automatic dialing function
2.Intelligent learning codes to facilitate increase and decrease configuration
3.Automatic dialing stored phone numbers
4.Long-distance alarm site monitoring and calling by telephone
5.Automatic sound recording
6.Dialing police center number directly.
7.Automatic AC/DC switching
8.Can send message to user
9.All kinds of GSM card can be compatible with the system, NO district restrict
