8 channel h.264 dvr Video Compression:H.264 Support SATA HDD&USB disk RS485 PTZ controller dual stream network transmission H.264 real-time high compression, support dual stream network transmissionStand-alone Linux2.6 operation systemGraphics & Windows OSD interfaceSupport D1, HD1 and CIF recording resolutionADPCM audio compressionSupport sextuple operation: visual recording, playback, realtime ...