The card will only support transfers of JPEGs and video formats supported by your phone or tablet and computer. You can also use a Mac or Windows desktop application to transfer images directly to a networked computer. With the app open you can start taking photos, and the card will connect to the device and start transferring images to it. The Mobi card is the easiest to setup and use: download the Mobi app to an iOS or Android device, put in an activation code that comes with the card, and you're basically done. (If your dSLR uses CompactFlash rather than SD cards, you can try your luck with an adapter.) Most cameras are compatible, but if you have an Eyefi Connected camera (of which there are many) you get extra features such as the capability to turn on and off the Wi-Fi radio, and to select and prioritize which images are transferred.

The biggest name in the space is Eyefi, which currently offers two SD card options: Mobi and Pro X2. However, the initial setup can be tricky, and the cards use your camera's battery for power, so you can expect slightly shorter battery life. They work with most cameras that use SD cards, and once you have one set up, it's relatively easy to use.

Considering you're getting storage and wireless in one card they're reasonably priced. Getting a Wi-Fi-enabled SD card is the easiest way to add some wireless functionality to your camera. Some are just for image transfers or for remote control with a smartphone or tablet, while others can do both and more.

There are ways to add wireless features to your current camera of choice, though. Also, if you have a camera that's only a year or two old, chances are you're not ready to run out and buy a new one just to add some wireless functionality to your shooting experience. However, while many new point-and-shoots have Wi-Fi built in, fewer dSLRs and mirrorless interchangeable lens cameras (ILC) have wireless connectivity. With more people packing smartphones and mobile hot spots, a camera with Wi-Fi gives you the control, flexibility, and quality of a dedicated camera with the capability to back up to a cloud service, computer, or mobile device while you shoot, or share shots online without offloading to a computer first.

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