... defense zone and wired defense zone3. The system supports the GSM cell phones, no need the fixed telephone line. 4. Can ... so on, 160pcs in total. 11.Send the SMS to GSM alarm system to program, it is very easy and quick ... , output 12V. Wireless receiving distance: >100mOperating Frequency: 433 MHZ, 850/900/1800/1900MHZStandard kits: a main panel,a voice speaker, a wireless ...