Nikon D4s User Manual page 300

D
HTTP Server Mode
The camera can not be used to record or view movies in http server
mode, while live view photography is not available if Silent is selected
for Live view photography in the shooting menu.
A
Wireless Transmitters
The principal differences between the WT-4 and WT-4A/B/C/D/E and
the WT-5 and WT-5A/B/C/D/E is in the number of channels supported;
unless otherwise stated, all references to the WT-4 also apply to the
WT-4A/B/C/D/E, while all references to the the WT-5 also apply to the
WT-5A/B/C/D/E.
Q
278