... 64bits,USB DVR,usb dvr box,cctv dvrusb dvr box, 1 channel usb dvr, 1 channels usb dvr, usb dvr for 4 channels,usb dvr box,dvr, cctv dvr,mini dvr, pen ... soon...)6. Recording format: *.asf (advance stream format); *.wmv7. Compression technology: MPEG-48. Image adjustment: Brightness, Contrast, Hue and Saturation (to ...