... . The main unit can be used as a telephone;7. Arm, disarm, monitor, and intercom by phone;8. Real-time, Delay, ... Volume: 110dBStandard pack components1 main panel, 1 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 LCD Security ...