RFID Reader  - Radio Frequency ID
This RFID reader detects the information held on RFID tags without them needing to connect electrically.
RFID is one of many near field technologies, which energises tags within its proximity and requests to read information stored on them such as security ID and other stored data.
The popular toy series SkyLanders popularised the technology for kids allowing the physical character to enter the gaming world.
Power is connected to +v and -v, whilst data is transferred from one of the Tx connections.