* With 4 routes of wired input alarm. * Monitor 3 phase loss voltage and single phase failure of the electric distribution network. * Can connect line-cut/movement/vibration sensors etc., It will alarm when power transformer is damaged or moved. * Send SMS to 6 preset mobile phone numbers automatically while alarming. * Auto-dial 2 preset phone numbers and monitor the alarm site while alarming. * Can program the alarm host and inquiry its status by SMS demand * Can report the communication status of alarm host in fixed time everyday. * Can set fixed-time arm/disarm. * Completely sealed aluminum outer shell: waterproof, anti-corrosion, fireproof, strike preventing which are suitable for outdoor installation. * Resist electromagnetic interference, lighting and thunder(New) * The system has power-off protection function. When the external power supply is damaged or the power is off, the system can continue to work with a backup battery. * Can install the solar battery that can supply the power for alarm host and charge the backup battery.(New) * External power failure alarm: when the system checks out that there is something wrong with the external power or the external power is off for more than 2 seconds, it will alarm immediately * Can connect with the alarm center through GSM network.