RFID Field Strength ...

Federal Communications Commission: RFID ...

... "we are increasing the maximum permitted field strength and transmission duration for 433 MHz RFID systems used to identify the contents of commercial shipping containers in commercial and industrial areas to allow more rapid and reliable data transmission. Such improved RFID systems could benefit commercial shippers and have significant homeland security benefits by enabling the entire contents of shipping containers to be easily and immediately identified, and by allowing a determination of whether tampering with their contents has occurred during shipping. " ...