GSM Alarm System 1.Obtain CCC,CE,RoHS,ISO9001 etc. ... brands 3.18 months warranty Business/Home GSM Alarm System with Voice and message alert Functions and Feasures: ... with the base.Monitor environment on the spot.Voice and message alert. Set alarm ON or OFF by remote controller. ... Call in to set alarm ON, OFF , Monitor ,Output.Send SMS to set alarm ON, OFF , Monitor , Output . ...