I have bought a pair of Sony wireless MDR-RF810RK, and after five to ten minutes of listening ,the transmission fails and the light switches off. If I switch on again it recommences for some minutes... Is it because it is near a wireless router and TV Box? What can I do?

You can get it from Microsoft

Sony Website
Choose your model number
Click "support"

https://www.sony.ca/en/electronics/support/wireless-headphones-bluetooth-headphones/mdr-zx770bn/manuals

Yes, electronic components fail with time: switches, especially capacitors, there can be dust or corrosion acting upon connections; really a multitude of age related problems CAN occur. (Not necessarily but can.) The problem becomes cost vs. benefit for repairing and another unit of that age is probably an inexpensive fix.

Probably a bit late for the original poster, but just in case anyone else comes across this....

I also have the Sony MDR-RF4000K wireless headphones and the problem with the sound cutting out has got steadily worse over time, to the point where I felt like throwing them away. I replaced the batteries (use normal rechargeable AAs with a bit of card to trip the little switch that would normally be tripped by the Sony battery pack), however that had no effect on the problem.

After a little research I have established that the power on the headphones themselves is triggered by a pull switch in the right ear cup. When you put the headphones on, the padded headband is stretched and pulls the switch up, turning the headphones on. The headphones have always been a little big on me, and I can imagine that the headband has stretched permanently in the last few years, probably leading to the switch on being more marginal.

At any rate, although I don't have a fix, I now know that if the sound cuts out, I don't need to take the headphones off - just pull the headband up slightly on the right-hand side, or push the headphones as a whole down a bit, again on the right-hand side.

Lookfor a light on the dash that says SECURITY or ANTITHEFT. If you see this light, that is a sign of a failed or failing antitheft system, which will disable your vehicle. This link explains

http://vatspasslockpasskeysecurityhelp.yolasite.com/

The best solution is to take it back where you purchased the car. It sounds like a problem with the neutral switch on the transmission.

Hi there. I had the same problem after a while of having them packed and unused! Try this: Hard clean the batteries connectors with alcohol or some other cleaning fluid (I don't remember which one I've used). It solved my problem and now they charge fine and even with the expiration date of the batteries expired they are still working but I mean working very very well. Hope this helped though somewhat late reply... Might help other users too!

check my solution here, maybe same for you

http://www.fixya.com/support/t4754232-my_base_unit_keeps_shutting_off_after_ab

sounds like a loose wire from maybe trying to overextend the allowable distance (cord stretching). alot of times its easier to buy a new pair instead of fixxing. Take the old pair apart if your interested in where the break is. could be easy as a little sawder gun fix.

that happent to me to the problem was a lose wire inside the headphone