Growing number of amusement parks, stadiums,spas, gyms and recreational facilities use RFID wristbands or ID tags to limit or control their guests to certain facilities.Corporate companies, hospitals and hotels can use this technology to track and limit access to unauthorised personnel and sound alarm automatically if intruders are trying to wander through.RFID readers are also installed on doors to ensure only staffs or guests are permitted to enter into the restricted areas.