There are plenty of "wired" or corded options available, because most phones can work with any headset that has a 2. 5-millimeter plug. With corded adapters in a...

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There are plenty of “wired” or corded options available, because most phones can work with any headset that has a 2.5-millimeter plug.

With corded adapters in a car, you have to avoid pulling a cable when twisting your head or wrapping a cord around the emergency brake or gear shift.

Most headset makers offer both wireless and corded options.

Some phones include headsets in the form of earbuds, such as Apple’s iPhone.

The iPhone’s system has a microphone embedded in a small, blocky part of one of the earbuds’ cables that also doubles as a pressable switch. The iPhone can pause music to handle a call, which you can accept or dismiss with a sequence of presses.

This can be problematic.

With one earbud in, the other dangles. With both in, you might run afoul of a police officer or trooper because state law prohibits wearing headsets or earphones that “muffle or exclude other sounds.”

An officer might decide your double-eared approach might not meet the law, and you might have to demonstrate otherwise to a judge to avoid paying a ticket.

— Glenn Fleishman