H.264 Indoor WIFI IP Camera: 1.Lens: Standard 3.6mm 2 ... 64,81-channel , no user limited , centralized monitor, remote record and playback , Skype message alarm, skype telephone alarmSystemOperation ... pop-up slot for SD cardView by SD Card Remote browsing, download of content from 32G tf card ... NetworkSocketRJ-45 10/100Mb self-adaptable Ethernet slotProtocolTCP/IP,HTTP,TCP,ICMP,UDP,ARP, IGMP,SMTP,FTP ...