... defend zone >GSM900/ DCS1800MHz >315 MHz or 433MHz Frequenc gsm security alarm system with Auto PIR Sensor 315/433Mhz Frquency 10 Wireless Zone ... PIR sensor, magnetic sensor and other top technology. When the system detects someone intrusion, the siren will ring at once. ... 1 wireless door sensor,1 siren, 2 remote controllers, 1 power supply, 1 GSM antenna, 1 manual Detailed pictures:Warranty:1 ...