THINKWARE's newest flagship dash cam model U1000 captures true 4K UHD resolution at the front and 2K QHD resolution at the rear, making it one of the highest resolution 2 channel dash cams in the market! Supplied as a kit, the U1000-2CH-128GB (order code U4KD128) includes the front dash cam, rear cam, hard wire kit and 128GB Micro SD card. Read more here. Running both videos at once will cause the PC Viewer to continuously buffer. The files can only be viewed separately, and you can still view the rear footage on the main screen of the PC viewer.