... securitySupports there-level account, password, user authority managementDDNS(free)Free DDNS bounded i.e., no need dyndns,like ... forwad, save bandwidth, cell phone video monitormutile software(free)1,4,9,16,25,36, 64-channel ... , centralized monitor, remote record and playback , Skype message alarm, skype telephone alarmCPUOperation systemEmbedded Linux OSMicrocomputer processorDSP+CPUVideoCompression ...