Embedded Linux 4CH Network DVR Digital Video Recorder 1) LAN 2) H.264 3) PTZ: RS485 ... ) 1 SATA interface Embedded Linux 4-CH Network CCTV DVR Digital Video Recorder with Dual USB/LAN/VGA/RS485/Video/Audio ... Out, Audio in/out, VGA, LAN, 2 x USB, RS485, DC 12V- Support 1 SATA interface, internal HDD up to 2TB ...