4CH H.264 Standalone DVR 1,Real-time DVR/ Network DVR 2,D1/HD1/CIF recording 3,1 SATA Port, 1 VGA 4, Alarm, Email, PTZ suppo Features: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 triplex operation: record, playback, net ...