Vehicle access keys: transponder chip, smart fob and traditional key blade

https://city-wiki.win/index.php/Vehicle_access_keys:_transponder_chip,_smart_fob_and_traditional_key_blade

For vehicle access, we have three separate key types to work with. The transponder chip is passively read when close to the reader, the smart fob offers button-press convenience, and the traditional key blade is the mechanical backup. Each serves a distinct function for entry.