>2U Dahua NVR IP Camera recorder HDMI >4 ch 1080P IP camera inputs >16 ch playback,HDMI >8 SATA,4 USB, >Free PSS software NVR3804V: 4 channel@D1, 4 channel@720P, 4 channel@1080P IP camera inputs, It can support HDMI, VGA, USB2.0, 8 HDDs and eSATA; It also can support voice intercom function.NVR3808V: 8 channel@D1, 8 channel@720P, 4 channel@1080P IP camera inputs, It can support HDMI, VGA, USB2.0, ...