... four wired defense zone3. The system supports the GSM cell phones, no need the fixed telephone line.4. Can ... system plays the recorded voice at first, call six phone numbers and send the short message (SMS)6. The SMS ( ... disarm, panic from long distance.9. Can control the system by using a telephone or cell phone ... 12 hours.13. With output relay, can control the home appliance, like light, cooker and so ...