Human Chips

[glatt]

According to the rfid journal

What is the read range for a typical RFID tag?
There really is no such thing as a "typical" RFID tag, and the read range of passive tags depends on many factors: the frequency of operation, the power of the reader, interference from other RF devices and so on. In general, low-frequency tags are read from a foot (0.33 meter) or less. High-frequency tags are read from about three feet (1 meter) and UHF tags are read from 10 to 20 feet. Where longer ranges are needed, such as for tracking railway cars, active tags use batteries to boost read ranges to 300 feet (100 meters) or more.

So I was wrong about my snarky inches to feet comment. A RFID tag will transmit about as far as a shouting human voice.