GSM Alarm System 1.Obtain CCC,CE,RoHS,ISO9001 etc. ... 10 Chinese security brands 3.18 months warranty Business/Home GSM Alarm System with Voice and message alert Functions and Feasures ... :GSM 900/1800/1900 bands , can be used all over the ... and message alert. Set alarm ON or OFF by remote controller.Call in to set alarm ON, OFF , Monitor ,Output. ...