Automated input of RFID information into a supply chain management system requires RFID readers to be located on shelves in warehouses, distributions centers, and possibly also in retail stores and in delivery trucks. Readers have a range of about one meter so that multiple readers are required. Readers can input information to the supply chain management database via wired connections, for example, using Ethernet, or using a wireless technology such as WiFi or WiMAX (Wright, 2007a, 2007b). The total cost of the system consists of the cost of the tags on each item flowing through the supply chain plus the cost of the readers. Although passive tags cost only US$0.20, readers cost approximately US$250.00.