GSM/PSTN LCD display security alarm system 1.blue color LCD display 2.support many language 3.5 ways arm/diarm GSM/PSTN LCD display security alarm system ... .support several languages:English, German, Russian, French, Chinese, etc; 5.with output relay, can connect big alond wired outdoor strobe siren6 ... : Power Supply: AC=110~240V, DC=9~15V 1ABuilt-in Li-Ion backup battery: 3.7V 1200mA, standby time is ...