There is a wifi setting on the camera that you turn on. It broadcasts out an SSID from the camera. Your smartphone can connect to it via its Wifi settings. Nikon provisions an app for the smartphone for free install. Once connected to the Nikon SSID over the smartphone Wifi, open the installed app. It provides a screen view into the camera's viewfinder and allows you to control the taking of pictures in a remote fashion. In addition, it can download pictures taken on the Nikon onto your smartphone.