See below. Used to be supplied as standard with certain trims - but now an optional accessory- a buttonless key-fob for keyless entry/start, waterproof and limited-life (integrated battery) widget that I really loved and almost exclusively used with my first SPA-gen car - but have learned to live without when I got my current XC40. Not a must-have definitely, but certainly a nice-to-have.
https://www.ebay.fr/itm/224442053961...mis&media=COPY