QNAP VS-6120-PRO+-US 6 Bay 20CH, VMS Built-In, 330Mbps Megapixel Recording IP Surveillance NVR Ports: 2 x Gigabit RJ-45 Ethernet port 2 x USB 3.0 port (Back: 2) 5 x USB 2.0 port (Front: 1; Back: 4) Video Output: 1 x HDMI Compression Format: MxPEG Motion JPEG MPEG-4 H.264 Operating System: Linux-embedded Dimensions: 6.89 x 10.12 x 9.25 (H x W x D)