RFID reader range varies tremendously based on a multitude of factors such as transmitter power, receiver sensitivity, environmental conditions, tag orientation, etc., but can range from inches to 300+ feet. Here is a link that you may find helpful - http://www.wireless-technology-advisor.com/rfid-range.html.
Last Wiki Answer Submitted: Jan 31, 2012 8:03 PM (GMT) by TechTalker 2,250 pts.