The advantages of the alarm systems S3523: 1. 8 wireless Zones and 2 hardwired zones, so you can use wireless zones or hardwired zones. 2. Support SMS function, the system will automatically send SMS to you what zone was trigged. 3. With Intercom and Wiretap functions, so you can speak to the house or listen into the house. 4. With AC power status monitor function. 5. With voice instructions and voice alert functions. 6. Based on the GSM communication network. 5sets/carton
