Features & Functions: 1)Implement the latest and advanced H.264 video compression and G.726 audio compression algorithms 2)Video and audio synchronized, clear sound without any noise 3) Real-time D1 resolution preview, no frame loss 4) Support online switching one channel to D1 size 5) Flexible video quality and bit rate tradeoff setting 6)Support IP remote surveillance motion detection recording and video loss alarm, etc. 7) All inputs are connected via an external cable, no additional audio cable or connection is needed Video Video compression standard:H.264 Frame Rate:1-25 f/s (PAL) or 1-30 f/s (NTSC) per channel Resolution: PAL: QCIF (176×144), CIF (352×288), HALF D1 (352×576), D1 (704×576) NTSC:QCIF (176×120), CIF (352×240), HALF D1 (352×480), D1 (704×480) Input:4 inputs for 4-ch card Output:Support online adjusting bit rate according to bandwidth, from 20Kbps to 3Mbps per channel Audio Audio compression standard:G.726 Input:4 inputs for 4-ch card Slot Type Standard PCI slot,compatible with popular main boards and VGA cards Power Power consumption:≤3W