This is a blank MiFare Classic card - often used for train/bus passes but also found in other systems where a proximity card is desired. The tag contains a NXP S50 chip and an antenna, and is passively powered by the reader/writer when placed a couple...

This is a blank 13.56MHz RFID/NFC keychain fob - often used for keys but also an easy way to tag something. The tag contains a small RFID chip and an antenna, and is passively powered by the reader/writer when placed a couple inches away. These can be...

This is a blank 13.56MHz Classic 'laundry' tag - often used for laundry or identification but also found in other systems where a small proximity card is desired. This one is clear!  The tag contains a small RFID chip and an antenna, and is...

The PN532 is the most popular NFC chip, and is what is embedded in pretty much every phone or device that does NFC. It can pretty much do it all, such as read and write to tags and cards, communicate with phones (say for payment processing), and 'act'...