NEW GSM+PSTN alarm system with LCD display and touch ... back.6. Arm/Disarm the system by 5 ways: SMS, alarm panel keypad, wireless keypad, Remote ... alarm host, very easy operation.9. Support wireless "ding-dong" doorbell function (Optional)10. Support CID uploading to CMS(Center monitoring ... sensor, 1 wired siren, 2 remote controllers, 1 power supply, 1 phone line , 1 manual NEW GSM+PSTN alarm system ...