This is a blank 13.56MHz RFID/NFC Sticker with an NTAG213 chip - often used for train/bus passes, information sharing, and contactless payment, but also found in other systems where a proximity card is desired. 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 read by almost any 13.56MHz RFID/NFC reader, but make sure it can handle ISO/IEC 14443 Type A cards (the standard NTAG uses) as there are a few other encoding...