... numbers by GSM dual-network when it alarming. Listening-in function is available for users by using mobile phone and telephone. This ... message;6. The main unit can be used as a telephone;7. Arm, disarm, monitor, and intercom by phone;8. ... wireless infrared (motion) detector, 1 wireless door magnetic detector,1 siren, 2 remote controllers, 1 power supply, 1 manual GSM Wireless SMS alarm systems with ...