Black Wireless Gaming Headset, GT839

Semi-in-ear, or half in-ear, buds rest at the canal entrance with no tip; in-ear buds seal it. That one difference sets isolation, bass and pressure.

Our product pages never describe a charging failure. Three of them describe a working charge — a case light that flashes from 1 to 100, a display that shows charging progress — and that is the reference you need before you start wiping contacts.

Only 14 of our 235 product pages say how to clean the earbuds they sell. They name different parts — mesh, contacts, tips, sound outlet, case — but every one of them uses a dry cloth and none allows a rinse. Here is the routine assembled from their exact words.

Thirty-nine of our product pages mention latency. Five give a figure, two name a mode, one declines to give a number, and thirty-one simply assert it. Here is how to tell which kind of line you are reading.