Low frequency (LF) operates in the 125–148.5 kHz range.
It is probably the oldest and most deployed RFID technology, due to its simple operation. LF usually features a very short range, complete lack of anticollision and a very limited bandwidth, but it is very successful due to the fact it is mostly unaffected by metals and liquids, to the point it is used for animal tagging as an injected tag.
See also Technologies.
