... .The yellow LED will light.- To check DVR working state, press PLAY button 3 seconds to open the DVR video on mirror ... ,press"PLAY"button 3 seconds again to close the DVR video.- When recording,press SW1 2 seconds to ... back.- When replaying,shortly press SW1 to select file,then shortly press SW2 to play back,shortly press SW2 again to pause,and ...