... ,Touch keypad,Big LCD display 2,GSM+PSTN dual network 3,8 wired + 30 wireless zones 4,Work ... Touch keypad; Big LCD displays 2. GSM+PSTN dual network. If PSTN is disable, it will switch to GSM ... zone attribute, name, bypass, alarm delay, intelligent door sensor function, beep indication could do free setting. 5. Alarm Inform ... pls connect with us freely......... GSM+PSTN Dual-network Home Alarm System