This product is either discontinued or we cannot get that from suppliers.
Dahua DH-XVR5216AN-4KL-X-4TB, 16 Channel, BNC, Bit 32Kbps ~ 6144Kbps Per Channel, Interface 1 RJ-45 Port (1000M), Resolution 4K, 6MP, 5MP, 4MP, 3MP, 4M-N, 1080P, 720P, 960H, D1, CIF, Audio Sample Rate 8KHz, 16 bit Per Channel.
Dahua 16 Channels Penta-brid Record Up To 4kivs Face Detection (DH-XVR5216AN-4KL-X-4TB)