Sony WH-1000XM4C · UK catalogue

The exact model guide places the earpads over the ears. No unlisted closed/open acoustic construction or measured isolation is inferred.

Approximately; the exact source states the mass of this headset.

The exact model guide expressly states that the headset is not waterproof. This is a documented manufacturer limitation.

The exact UK model page positively describes a foldable structure; no durability or packed dimensions are inferred.

Only positively documented audio connections are listed. The analogue cable disables Bluetooth; a USB charging connector does not establish USB audio. The headset can play passive analogue audio when turned off.

Manufacturer full-charge Bluetooth music maxima. Equalizer, DSEE Extreme, Speak-to-Chat, Service Link and other changes from defaults shorten runtime. Calls have separate 20/16/27-hour limits; powered analogue use has 19/16/32-hour limits for noise cancelling/Ambient Sound/inactive respectively.

Built-in lithium-ion batteries are explicitly named. The operating voltage is not converted into a capacity; user replaceability is not inferred.

Approximately; actual charging time varies with conditions of use.

The retained exact-model specification does not establish a battery capacity in mAh. Operating voltage and playback endurance do not establish this quantity.

Wireless charging is not established in the retained exact-model evidence; documented USB charging does not establish absence.

Positively listed supported music codecs; unlisted formats are not marked unsupported. LDAC playback requires the applicable sound-quality setting and compatible transmitting device.

The exact retained specification names Bluetooth without a numbered version; no number is inferred from codecs, profiles or another model.

The guide explicitly documents two-device simultaneous Bluetooth connection. It allows switching playback and waiting for calls; this is not simultaneous mixed music from both devices.

The exact guide expressly permits listening when the headset is turned off; active noise cancelling then cannot be used.

The exact guide positively names a noise-cancelling headset and documents its active noise-cancelling mode. Presence is not an independently measured attenuation result.

The exact model guide documents voice pickup and call or chat controls; microphone noise filtering does not establish measured attenuation or call quality.

The exact guide names Sound Connect; available functions depend on the connection, device and settings.