>wireless gsm security alarm sms alert >10 wireless defend zone >GSM900/ DCS1800MHz > ... or 433MHz Frequenc wireless gsm security alarm sms alert with Auto PIR Sensor 315/433Mhz Frquency 10 ... at once. Meanwhile, the system will send SMS first then auto-dial 5 phone numbers to notice ... Standard package components:1 main panel, 1 wireless PIR detector, 1 wireless door sensor,1 siren, 2 remote controllers ...