... , 4CH Audio Input 1SATA HDD, Max 2048G 4-CH Alarm input DVR, Stand alone DVR, Network DVR Main Features1. H.264 main profile ... , PPPOE, FTP, DNS, DDNS, NTP, EMAIL, IP permissions, IP searches, Alarm Center, etc.) And a full Matching (WEB, Client, SDK) which ... the earlier working status of the DVR by this. DVR, Stand alone DVR, Network DVR