The Phidgets Writable RFID Tag - PVC Disc 30mm is a versatile, disc-style RFID tag designed for read and write operations. It is shipped blank and requires a compatible RFID reader, such as the PhidgetRFID Read-Write, to encode data onto the tag. The tag's flat, round design makes it suitable for diverse applications, and it is compatible with all Phidget RFID controllers. Utilizing the T5577 chipset, this tag operates at a transmission frequency of 125 kHz and is constructed from durable PVC plastic.