AZDelivery 50 x RFID Keycards MF S50 13,56 MHz compatible with Arduino including E-Book!

The media could not be loaded.  Work great and good value. Used with a Raspberry Pi to create a jukebox for my kids to be able to play stories and music by themselves. Don’t want them using iPads etc so this is a great solution. Would recommend these RFID cards for similar projects.

It does what it says, not much more I can say. Except it's value for money