DVR system (Digital Video Recorder) that records video images in real time on an internal hard disk. Ideal for CCTV applications (closed circuit television) and video surveillance. 4-channel model with compressed video recording technology with H.264, D1, HD1 and CIF standard. It allows to manage 2 hard disks of up to 3 TB (disc not included) Includes support VGA, ethernet TCP/IP, RS485, connection to external sensors, connection to alarm and remote access via web or mobile device. Specifications 4 channels of composite video input (4 x BNC female). 2 channels of composite video output (2 x BNC female). 4 audio input channels (4 x RCA female). 1 audio output channel (1 x RCA female). 1 HDMI output for monitor connection (1 x HDMI A female). 1 VGA output for monitor connection (1 x HD15 female). 1 SDI + D1 output for HD monitor connection (1 x BNC female). 1 A-Female USB connector for connection of a standard mouse for OSD control of the device. 1 RS-485 port (3-pin terminal block)