Outstanding features 1) When the panel is moved, the alarm will take place and the siren will sound with high db In the meanwhile, the alarm will auto dial the phones preset. 2)Compatible with the internal Digital Communication Standard - Ademco protocol such as CONTACT ID, 4+2 EXPRESS, 4/2 3) When the offender cuts the phone line, the panel will sound at high db. Simultaneously the panel of the neighbors can auto dial the phone to notice the alarm. It solves the fatal problem of the transitional alarm system that it can only alarm without auto dial when the phone line is cut. 10 units/ctn