125kHz is the transmission frequency. It's one of the unregulated frequencies for RFID tags, but sort of an industry standard value commonly used in retail prod

125kHz is the transmission frequency. It's one of the unregulated frequencies for RFID tags, but sort of an industry standard value commonly used in retail products and goats. Most other cattle use tags at 134kHz. NFC is mostly just RFID at 13.56mHz.