Support ANR Technology: to enhance the storage reliability when the network break down. Internal HDD: 1 SATA III Port, Up to 6 TB capacity for each HDD. USB: 2 USB Ports (2 USB2.0). Two-way Talk: 1 Channel Input, 1 Channel Output, RCA. Others: IP Camera Input- 4 Channel, H.264+ codec decoding, Max 80Mbps Incoming Bandwidth, Up to 5MP Resolution for Preview and Playback,HDMI/VGA simultaneous video output. Warranty: 01 Years.