I am looking to get a wireless headset but this means getting a usb headset so i was wondering if i would be able to take the output from another device (my tv or phone with a 3.5mm audio jack) have it run through the microphone jack (by a 3.5mm male to 3.5mm cable) on my desktop computer and back out by a program to my headset so i could use the headset for any device with an audio jack but would the audio from the device to the microphone jack work?
Get an RCA switch. There is 1 output and multiple inputs. Connect all the devices you want to use to the inputs - phone, tablet, pc and then connect the output to your wireless headphones. You will need a few RCA (white/red) to jack cables.
Then just hit the switch for whatever device you want to use. There is no power adapter required. Simple and quick.