... ,4,9,16,25,36, 64,81-channel , no user limited , centralized monitor, remote record and playback SystemOperation systemEmbedded Linux OSSystem ... tf card NetworkSocketRJ-45 10/100Mb self-adaptable Ethernet slotProtocolTCP/IP,TCP,ICMP,UDP,ARP, IGMP,SMTP,FTP,DHCP,DNS,DDNS ... CE Auto White Balance,IR wifi camera with night vision ip camera plug and play