This product is either discontinued or we cannot get that from suppliers.
Dahua DH-XVR5216AN-4KL-X, 16-Channel Penta-brid 1U 3TB 4K Lite Digital Video Recorder, 16+8 Channel (IP), Processor Embedded, Max Resolution 8MP 4K (3840x2160) @25/30fps, Encoding H.264/H.264+, H.265/H.265+, Storage 2x SATA Port (1x 3TB HDD), Interface 1x HDMI, 1x VGA, 1x USB 3.0, 1x USB 2.0, 1x RJ45 (1000M), 1x RS485, 2x RCA (In/Out), Video HDCVI/AHD/TVI/CVBS/IP.
Dahua 16 Channels Penta-brid Record Up To 4kivs Face Detection (DH-XVR5216AN-4KL-X)