Can I use these headphones with BlueTooth from a computer playing i-tunes? How do I get an instruction manual? ... I lost the original documentation.

Myron & Davis wireless headphones are likely designed to be used as Bluetooth headphones. They can sync or pair with Bluetooth-enabled devices such as smartphones, tablets, computers, or other compatible devices.
To use the headphones, follow these general steps:

1. Turn on the wireless headphones and put them in pairing mode. This may involve holding down a button or following specific instructions provided in the user manual.
2. On your Bluetooth-enabled device, enable Bluetooth in the settings and search for nearby devices.
3. When you see the Myron & Davis headphones appear in the list of available devices, select them to initiate the pairing process.
4. Once the pairing is successful, you should be able to use the wireless headphones to listen to audio from your connected device.

Keep in mind that the exact pairing process and features may vary depending on the specific model of Myron & Davis wireless headphones you have. If you have the user manual that came with the headphones, it's a good idea to refer to it for detailed instructions. Otherwise, you can try searching online for the manual or contact the manufacturer's customer support for assistance.

yes but setting it up using wireless headphones would be easier.
3.5mm to RCA Stereo Audio Cable Adapter
Amazon Basics 1-Male to 2-Female RCA Y-Adapter Splitter Cable - 12-Inches


copy and paste
https://www.manualslib.com/manual/700621/Panasonic-Viera-Th-P42u20z.html?page=11#manual


..

1. Try playing other audio files. Ensure that audio can play fine from the same audio device when using a headphone.



2. If Step 1 is not the case, try listening to audio by connecting the speaker to the Bluetooth device using the Aux-in cable. This will isolate if it's a Bluetooth connection issue or not. Remember to disconnect/un-pair the Bluetooth connection first.



3. If the issue only happens when connecting via Bluetooth, do the following:
   1. Adjust the distance between the speaker and the Bluetooth device.
   2. Reset the speaker to its factory default settings. For instructions on how to reset your speaker, go to the product's support site to view the relevant knowledgebase article.
   3. Clear the current pairing entry from your Bluetooth device. For instructions on how to clear the pairing entries, consult the user's manual of your Bluetooth device.
   4. Try re-pairing the speaker and the Bluetooth device. For instructions on how to pair the speaker with the Bluetooth device, go to the product's support site to view the relevant knowledgebase article.
   5. To further isolate, try pairing the speaker with other Bluetooth device.


4. If the issue happens when connecting either on Bluetooth or Aux-in, please contact Creative Customer Support via email.

Note: Creative Bluetooth speakers do not need any driver to operate. You may need to update the Bluetooth driver of your computer's built-in Bluetooth adapter or your USB dongle. To determine whether your computer or USB dongle is updated with the latest Bluetooth driver, please refer to their user's guide or website for information.
http://support.creative.com/kb/ShowArticle.aspx?sid=90429

Unfortunately, the iPhone doesn't (yet) have such capability built-in. But engaging the iPod function to listen to music/video audio while a call is taking place will allow you to hear said audio. Obviously this is not an ideal solution. If your phone is jailbroken, there is a tweak to enable music to be played through the bluetooth headphones but it is low quality.

you have to give command or playing through headphones.

Click the link below to open the manual.

Insignia Pilot Audible User Guide

What software are you using to pair the headphones?  Are you using the software from the CD that came with the headset?  Or are you using Windows built-in software?
If you are using Windows' software, then you need to download the correct driver from the link below.  Although the Windows software will pair with any bluetooth device, it does not support audio.
http://drivers.anycom.com/bluetooth/usb-200-250/anycom-bluetooth-usb200-250-windows-v5-1-0-4200.exe

If you are using the CD that came with the headset, try uninstalling then re-installing.

go on ur phone and go 2 bluetooth pairing. before u click pair, turn on ur headphones and hold the multi function( button w/ play button and phone symbols) button until flashes blue and red lights simultaneously. once flashing, enter and start bluetooth paring on ur phone. the code is 0000. enjoy using ur bluetooth.