Nikon D6 Reference Manual page 1124

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Wireless Transmitter Utility: The Wireless Transmitter Utility is
required if the camera is to be connected to a network. Pair the camera
with the computer and download pictures via Wi-Fi.
Smartphone (Tablet) Apps
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Smartphone apps can be downloaded from the Apple App Store® or on
Google Play™. Visit the Nikon website for the latest information.
SnapBridge: Download photos and movies from the camera to your
smart device via a wireless connection.
1072 Software