... FEATURES: Stand-Alone DVR, H.264 Compression High quality video Display : NTSC (720x480), PAL (704x576) real time display ... same time Backup: CD-RW (Option: DVD-RW), USB 2.0 and NET backup supported PTZ camera control ... without Voltage,Open or ClosedAlarm ModeSensor Input, Motion Detection, Video Loss, Full Disk Space.NetworkEthernet (10/100M )LANWAN ... 4ch h.264 stand alone dvr and cctv video recorder