UltraHD 4K; Support 1-ch HDMI ,1-ch VGA, HMDI at up to 4K(3840×2160) resolution; Up to 8 Megapixels resolution recording; 8-ch network cameras can be connected with 40M/60M/80M incoming bandwidth; SupportH.265/H.264/MPEG4 video formats; Audio Output: 1-ch, RCA ; 2 x SATA interfaces/6TB for 2HDDs (not included); USB Interface:, Front panel: 1 ×USB 2.0 ;Rearpanel: 1×USB 3.0; Alarm In/out: 4/1; Chassis: 385 mm chassis;