The item is a set of 10pcs professional and practical RFID key fobs, which is designed for RFID proximity access system, and compatible with all RFID reader for access. Each token key fob has been pre-programmed with unique number, and this RFID is read only and not rewritable. Features - 10 pieces of the RFID ID token key fobs in one set will be together. - Color: mainly blue. - Shell material: durable hard plastic. - and EM4100 125KHz RFID Proximity ID Token Tags Key Fobs Keyfobs. - Each token key fob has been pre-programmed with unique ID number which is printed , and this RFID is read only and not rewritable. - Compatible with all RFID reader to gain access. - Water resistant design, and each comes with a key ring. - Transponder type: passive. type: EM4100 compatible. - Operating frequency: 125KHz. - reading distance: 0-10cm. - -number: 64Byte. - Widely applied in access control system and related applications. Package list: 10 * EM4100 125KHz RFID Proximity ID Token Tags Key Fobs Keyfobs for Access Contorl System (Blue)