Used, very good condition, UNTESTED

Automatically transfer images to your smartphone or tablet for instant sharing after you download the "Wireless Mobile Adapter Utility" app
Use your smartphone or tablet to see from the camera's perspective and trigger the shutter release
Connects via Wi-Fi Protected Setup (WPS)
The WU-1a is compatible with the following Nikon cameras: D7100, D5200, D3200, D3300, Df, COOLPIX A, COOLPIX P330, COOLPIX P520, COOLPIX P530, COOLPIX P7800, Nikon 1 S2
Specifications and Compatibility: OS: Smartphones, Tablets:Android version 2.3 or later (smartphone), Android version 3.0 or later (tablet). iPhone and iPad: iOS version 6.0 or later.