1.Frequency: 850/900/1800/1900MHz 2.640 x 480 pixels 3.can ... authentication,user passed database of account authentication.Product feature CommunicationFrequency: 850/900/1800/1900MHz, can be suit for every country all ... monitoringOutput:RS232 KB1000 wireless photographed system,GPRS camera,quad-band(850/900/1800/1900MHZ)