The pocketwizard cm n3 acc 1 remote cable is for remotely triggering the electronic shutter release of canon cameras equipped with a n3 remote terminal it is required for remote camera triggering with a flextt5 trigger if using e ttl functions in addition the pocketwizard cm n3 acc 1 cable contains a pre trigger connection when a remote zone is enabled on a multimax the camera behaves as if the cameras shutter release button were held half pressed continuously the pocketwizard cm n3 acc