NR9681-V2-56TB Vivotek 64 Channel NVR 512Mbps Max Throughput - 54TB
NR9681-V2-72TB Vivotek 64 Channel NVR 512Mbps Max Throughput - 72TB
NR9681-V2-144TB Vivotek 64 Channel NVR 512Mbps Max Throughput - 144TB