What does the ID on the car key mean?

[SanHaven]

Car key ID refers to the registered number of the key. Through the ID, car key users can check parameters such as the manufacturer and working frequency of the key. Additionally, the ID may be required when the key is lost or when duplicating a key. Car remote keys are wireless communication anti-theft devices that require manufacturer registration for use. Extended information: 1. The ID key fob is a read-only contactless IC card. It is powered by the reader's induction and reads the unique card number stored in the chip's EEPROM. The card number is written once before sealing and cannot be changed afterward. 2. The two most prominent features of this chip are being passive and contactless. The RF interface circuit is the key core technology, which works by receiving RF energy from the reader to generate power and clock for the chip, and uses phase-shift keying and load amplitude modulation to achieve wireless communication between the card and the reader. Contactless ID cards are widely used due to their outstanding advantages of convenience, speed, and reliability.