A:AnswerHi Billy,
We're sorry to hear that you're having some connectivity issues with the headphones. Let's try to isolate this issue by following some troubleshooting steps on this link. https://helpguide.sony.net/mdr/whh900n/v1/en/contents/TP0001513185.html
https://helpguide.sony.net/mdr/whh900n/v1/en/contents/TP0001513198.html
Regards, Sam
A:AnswerThese are wireless headphones. Wether they work with your Bluetooth transmitter you need to make sure it supports HFP, HSP, A2DP, AVRCP and LDAC Bluetooth profiles.
A:AnswerIf the battery runs out, you can use the 3.5mm cord to listen to audio. Special features require battery power to work.
According to the manufacturer, a full charge takes 6 hours, but if you need to use your headset quickly, 10 minutes of charging gives you 65 minutes of wireless use.
A:AnswerThere are YouTube videos that will explain this in more detail, but it seems like mostly minor changes. The changes that I saw from the wh-1000 mk2 are the cup designs, which may slightly affect the noise cancellation. The obvious color choices. The battery life is slightly less than the mk2's, but still above average.
The major things remain the same, noise cancellation, touch controls, etc.
A:AnswerHi Phoenix, It is recommend to use a computer for charging the headphones. You may refer to pages 14-15 of this link for more information:
https://docs.sony.com/release//Help_4697223113.pdf
~Ralph
