Model Number: SC-XA42-1TB-2CD Features: AHD Recording Device - 4ch HDD - 1TB Method: AHD Recording Compatible Network Cameras: Network cameras can be connected using the LAN port on the back of the recording device. (A separate router is required.) Maximum Resolution: 1920×1080 Compatible Cables: [Camera Extension Cable (sold separately)] SC-AHDC30 (30m), SC-AHDC40 (40m), SC-AHDC50 (50m), [Camera Extension Cable with Microphone Jack (sold separately)] SC-AHDC30M (30m), SC-AHDC40M (40m), SC-AHDC50M (50m) *These are cables for extending the camera cable; please note that extending the extension cable is not possible. Both ends are BNC male connectors. Cables: Camera extension cable with microphone jack (cable length 20m) x 1, Camera extension cable (cable length 20m) x 2 Pixel Count: 2.64 million pixels Maximum Number of Connections: Up to 4 cameras, 1 with a microphone D3