This a mini coin size read-only RFID Sticker Tag. It works in the 125 KHz frequency range. It comes with 3M Double Sided Tape which can be used to stick the tag onto objects. RFID is useful for sensing and identifying tagged people and objects for access control, automation, inventory management, and a whole range of different applications. This basic coin-size RFID tag works in the 125kHz RF range and comes with a unique 32-bit ID.