Wired closed-back detecting headphones
Closed-back · 1/4in jack · per-cup volume · coiled cable · Budget to mid · best value in detecting
This is the default answer and it has been for twenty years. Closed cups block wind and traffic, the cable adds zero delay, and there's no battery to die two hours into a good field.
Individual volume control on each cup is the feature to insist on. Detectors get loud on shallow targets and whisper on deep ones; being able to trim the level without diving into a menu is what keeps you hunting rather than fiddling.
Check the plug before you buy. Most full-size detectors use a 1/4 inch jack, most kids' and budget machines use 3.5mm. An adapter is a dollar, but only if you know you need one.