The S3526 is a new GSM Alarm from professional GSM Alarm, gsm home alarm, gsm sms alarm, gsm burglar alarm, gsm house alarm OEM ODM Manufacturer! The GSM Alarm System S3526 with Siemens GSM Module inside, very reliable, with 2 wired zones, 8 wireless zones,1 Output relay, and entire voice instructions. it is very popular for house, home, office, store,shop and other applications.