From Nikon:
The WU-1a and WU-1b are USB wireless adapters that can establish a two way wireless connection between specific cameras and iOS and Android smart devices and tablets. The USB connections on the WU-1a and WU-1b are different so it is important that the correct adapter is used for the specific camera.
The table below confirms which cameras are compatible with each adapter.
WU-1a | WU-1b | |
D-SLR | D5300, D3200 | D600 |
Nikon 1 | J3, S1, V2 | |
COOLPIX | P520 |
The Wireless Mobile Adapter Utility (“app”) is used in combination with the WU-1a and WU-1b to download pictures from the camera and to release the camera shutter remotely. Click here for further information regarding operating system and mobile device compatibility.