Comment Smartphones are expected. Other devices less so. (Score 1) 54
A discrete device permits recording without leaving a trace on expected hardware. There are many good reasons to defensively record interactions. The world is a high threat environment that can instantly turn bad. It's wise to know your legal and technical options well in advance of need.
A common example predating smart phones is truck drivers recording interactions with their dispatchers. That goes back to the miniature magnetic tape recorder era. Proof matters.