When upgrading NVR from v3.4.x to v4.x, please be sure NVR firmware is at v3.4.92 170518 firmware and perform system factory default before proceed upgrading NVR to v4.x. Failures have NVR at v3.4.92 and perform system factory default prior to upgrading NVR to v4.x could render NVR inoperable.
12 MP Recording Resolution
32 IP Camera Inputs (320 Mbps Total Inbound Bandwidth)
H.265+/H.265/H.264+/H.264/MPEG4
4K (3840 × 2160) HDMI Video Output
4 x SATA HDD Interfaces
Smart Search and Smart Playback
Long Distance (100 to 300 m) Network Transmission via PoE