Hikvision DS-7204HI network digital video recorder is new generation excellent digital surveillance product. It uses Embedded Linux OS and the latest TI DaVinci DSP. It supports both features of digital video recorder (DVR) and digital video server (DVS). It can work stand alone or be used to build a powerful network, widely used in surveillance fields. Note: Default DVR are without HDD. The VGA Output Interface is optional. Emphasize when ordering. (DS-7204HI-V)