... DVR Card -H.264 Compression, -4CH Video,4CH Audio -Support All Windows OS -Easy Connect All Laptop & PC 4 Channel ... Full D1 H.264 Laptop USB 2.0 DVR Card (SY-UR041) 1,4CH ... 7 64bits & all window OS4,Video/Audio Channel:4chs video/4 chs Audio5,Compression mode : H.264 Main ... ,10G available Hard DiskWelcome to visit SOONY!!! 4 Channel USB 2.0 DVR Card (SY-UR041)