QR500 QR code reader. The QR500 reader is a new generation of intelligent access control reader. It has fast scanning speed, high recognition rate, High compatibility, and can be connected to ACT365 Access Control Units The QR500 is a Wiegand enabled device, simple to install and is perfect for Visitor Management in Hotels, B&B’s, sporting facilities, VIP shopping appointments, health clinic appointments or delivery services amongst other applications.