- #26
Tom.G
Science Advisor
- 2,874
- 1,635
There are even SD cards with radio links (WiFi?) built in. They are used in Digital Cameras so you don't have to mess with cables to download the photos to your computer.I'm sure there are battery powered WiFi or Bluetooth SD card readers.
Try this Google search for details:
https://www.google.com/search?&q=sd+card+wifi+how+it+works