Wireless Spark Plugs?

A friend of mine has a Nissan Altima. Not sure what year.
She mentioned that she has to replace the spark plugs at the next service, and that they are "Wireless."

I have never heard of wireless spark plugs. Can someone explain to me how they work please?

A very old dumb retired mechanic !

She likely means they are coil on plug, which means each individual plug has its own coil. There are no spark plug wires.