DVR 1.USB2.0, USB mouse USB backup,USB-RW ,USB upgrade cooperation stable 2.Support multiple-ch 3G, also support cottage phone 16 channel DVR 100 FPS Realtime Recording H.264 Compression VG-H8104 Feature:H.264 double stream, advanced and filtering techniques make streaming save 28% HDDUSB2.0, USB mouse ,USB backup,USB-RW ,USB upgrade cooperation stableSimilar to Windows operating style, powerful ...