A digislate is a clapperboard with an inbuilt electronic box displaying SMPTE time codes. The timecode displayed on the clapperboard will have been jam synced with the internal clock of the camera, so that in theory it should be easy for the film editor to pull the timecode metadata from the video file and sound clip and synchronize them together. However, electronic timecodes can still drift during a long shooting day, so the clapper sticks on the clapperboard still need to be closed together in order to ensure there is a way of manually synchronizing the footage and audio if matching the digital timecode fails.
