The GSM Alarm System S100 with multi-functions. It integrated GSM Module inside, and almost all useful functions and features of the alarm systems in the worldwide markets. Also it with innovative and experienced functions and features to meet the required and potential demands. The GSM Alarm System S100 is a new security protection solution. It is special for home, house and office and other applications. It based on Wireless GSM Communication network; it can alert you by SMS and calling.