... intelligent automatic control.4. Phone, APP or SMS remote host system settings.( iOS APP, just search " GSM alarm" from apple ... location of police intelligence and anti-code.7. Remote remote monitoring, propaganda function, and can remote phone or send text messages ... 11. Siren's volume can be adjustable. G3+ GSM ALARM SYSTEM Specifications1. Wireless frequency: 315/433/868/915MHz,2262/1.5 ...