Phoenix PSTN Alarm Systems - Independently Working PSTN Wireless Home Alarm System with Auto Dialer - PSTN Home Alarm System with built-in Backup Battery &ndash; PSTN can also be controlled by Mobile Phone ### IMPORTANT: PH-SD55 is an Advanced Alarm requiring a fixed telephone landline for the operation. Please first go through the online user manual [ by searching online for "PH-SD55 User Manual" ] to see whether PH-SD55 fits your needs. ### This Easy-to-operate PSTN Alarm System will Auto-Dial Some Groups of Numbers and Send Alarm Record when it Alarms. * Six Defense Zones are available, with status LED, in this PSTN Burglar Alarm. This Wireless 6 Programmable Defense Zone Security Alarm System has Anti-Interfere function. When someone interferes it with same frequency, the control unit will activate siren to alarm. This PSTN Burglar Alarm System Supports anti-decode with remote control. The control panel can register 99 sensors and detectors. Every defense zone can set independently arm, disarm, delay alarm and so on. * PSTN Alarm Receiver with the function of one-key arm. User can start Home arm or Out arm freely by continuosly pressing one key on remote control. You Can set the reminder sound of defense zones in this PSTN Auto Dialer Alarm. It will remind users to arm the alarm system when going out. * This PSTN Wireless Alarm can also work with other products like wireless big outdoor siren and mini siren. * This PSTN Wireless Alarm System stores 2 groups of monitoring center and 6 groups of user phone numbers to dial out and play the recorded message if there is an alarm. * You Can arm / disarm with remote control or keypad on the control panel of this PSTN Wireless Smart Alarm. You Can arm / disarm / listen-in by calling the host phone number (the phone numbers of control panel) of this Wireless PSTN Alarm System. * This Wireless Alarm System PSTN can alert for circuit failure. (e.g. If telephone line is cut or short, the control panel will sound alarm). * This PSTN Wireless Alarm System with Status LED has also in-built backup battery and can continue to work for 8 -10 hours without electric power supply. Cheap, Simple, Powerful, White PSTN Home Alarm - Be Protected with Our Best Guarantee and Lifetime Support