Nikon D4S - Manual (Page 55)

45
Synchronized Release
Synchronized release groups one master D4S camera with up to
ten remote cameras and synchronizes the shutters on the remote
D4S camera with the release on the master camera. The master
and remote cameras must all be equipped with optional WT-5
wireless transmitters. Note that the standby timer will not expire
automatically when the camera is in synchronized release mode.
A
D4 Cameras
Synchronized release can also be used with D4 cameras to which WT-5
wireless transmitter have been connected.