How am I expected to carry a key fob equivalent of a smart card attached to my key ring?

1. What is a FOB card?
2. What does FOB stand for in a key?
3. How does a fob key work?

What is a FOB card?

Fobs and key cards are electronic devices that allow authorized tenants to unlock doors. They're a popular keyless entry system for businesses, apartments, industrial facilities, and other types of buildings.

What does FOB stand for in a key?

The word “fob” was likely derived from the German fuppe, meaning “pocket.” Before key fobs were an electronic device, they were another word for decorative keychains throughout the 20th century.

How does a fob key work?

A key fob contains a short-range radio transmitter/radio frequency identification (RFID) chip and antenna. It uses radio frequencies to send a distinct coded signal to a receiver unit in the device. This receiver also contains an RFID tag, which is some form of stored information.