... record modeRecycling record modeP.T.Z control functionUsers managementMulti-channel displaySupport 320x240 / 640x480 (NTSC), 352x288 / 704x576(PAL ... ) standard resolutions.Image color adjustable for each channel, including contrast, lightness, hue and saturation.MPEG4 compression ... DirectX 9.0 or aboveOne available USB 2.0 port EzCAP 3104B channel USB DVR,USB DVR,DVR,Cheap DVR-EzCAP3104