I don't know for certain what Wal-Mart is going to be using, but in general the RF ID tags used in retailing are not at 433 MHz. I believe they're either at LF or at 13.56 MHz. Dave -----Original Message----- From: dick@pobox.com [mailto:dick@pobox.com] Sent: Thursday, November 06, 2003 9:24 PM To: arrl-odv Subject: [ARRL-ODV:9698] Wal-Mart Keeps the Change (RFID) 6 NOV, 2003 - 2020 CST A local ham friend sent me this Fortune Magazine article about how Walmart plans to use RFIDs... let the RF chirping begin. http://www.fortune.com/fortune/technology/articles/0,15114,526418,00.html 73 - Dick, W9GIG