... in which case we recommen Features: 4CH laptop USB DVR 4 channels video input .the maximum Display/recording rate is ... under PAL Format. and 30 fps under NTSC format.4 screen display modes are available.Multi alarm triggering method ... PAL) 640×480,320×240(NTSC)Recorder Media: HDD,USB Disk, ZIP,CD-R/W via PCRecord Mode: ... company send the goods by EMS,which usually by 4 to 7 days.If it over the scope ...