Factory Direct gsm alarm system:1)New & hot home alarm 2) SIMCOME module 3) New main board 4) Import chip5) Lcd display GSM wieless home alarm system & personal alarm panel protect and monitor house, supermarket, office, villa,factory, farm and so on. SpecificationsA.Support GSM network, no telephone line will be available.B.Support Monitoring centor software though GSM network.C.Support battery ...