Nikon WU-1b Wireless Mobile Adapter for DSLR Cameras - WiFi Remote Control & Image Transfer for Smartphones (iOS/Android) - Perfect for Travel Photography, Social Media Sharing & Professional Shooting

I bought this so I could upload images to my phone or tablet on the spot and it does just that. I havnt dealt with any connection issues and I've been using it constantly for about a month atleast. There is no degradation of images tho the time to upload images varies. One thing to mention is that when plugged in you cannot use your view finder to view images you have to use your device that is connected. I'm very happy with this purchase and does what it's intended to do. It's also very small so make sure to connect to your camera strap like me or to something so it won't get lost.