... function Car video records JK84-4X HD Car card DVR recorder/ car card dvr recorder/car dvr PRODUCT OVERVIEW JK84-4X ... alarm event video (pre-recorded), etc.6, support the SD card automatically covered, protect alarm video7, supports 4-way recording8, support ... video preview14, support single screen, 4 screen display15, support GPS module. can GPS positioning function 16, can record vehicle speed and ...