Directly and wirelessly -- no dongle or receiver. Hold the play button for three seconds and they announce themselves and start looking; pick "Keyscaper S31 ANC" on your phone, tablet, laptop or handheld. There is nothing to install.

Yes, and it is the feature worth knowing about. Keep a laptop and a phone connected at the same time: play from either, and a call on one interrupts the other and hands back on its own when you hang up. The pairing order is specific -- pair the first device, switch its wireless off, pair the second, then switch the first back on.

Yes. A 48-inch 3.5 mm cable is in the box. Plug it in and the noise cancelling and wireless circuitry power down, letting the audio run straight to the earcups -- which means wired listening needs no battery at all and still plays when the charge is completely gone. That is the one you want at hour nine of a flight. The trade is that there is no noise cancelling while wired.

Very well on the steady, low sounds that wear you down -- aircraft cabin drone, train rumble, road noise, an air conditioner, the hum of an open-plan office. Less so on sudden or high sounds like a door closing or a nearby conversation; no noise cancelling handles those well, and the earcups themselves do most of that work.

Good for casual and handheld play, including the Valve Steam Deck. There is a Game mode -- once they are on, hold the play button for three seconds -- that trades a little acoustic depth to cut latency to about 60 ms from roughly 300. We will be straight with you: this is not a competitive-shooter headset, and if you play those seriously you want something wired. But for casual and mobile play it is a comfortable set that runs all day.

About 35 hours with noise cancelling on -- and that is measured at full volume, not resting. Most headphones quote their number with cancelling off; this is the one you will actually get. A full charge takes about two hours.

Genuinely easy. 226 grams, which is light for over-ear noise cancelling, and the cups fold flat into the included case with a carabiner to clip it to a bag. With 35 hours on a charge you can fly a long-haul route and a layover without hunting for an outlet.

USB-C, about two hours from flat. A 20-inch cable is in the box. Any standard USB charger works -- a computer port, a phone charger, or a fast charger. They all supply 5 V unless a device asks for more, and these never do.

Yes -- it's backed by a one-year Keyscaper warranty against manufacturing defects in materials and workmanship under normal use. For warranty claims or product questions, email support@keyscaper.com or use the contact form at keyscaper.com, both reach the same place.