The best wireless headphones deliver sound that comes close to that of top-quality wired models. The limitations of Bluetooth keep those portable wireless headphones from sounding quite as good as wireless models that use other technologies, but the sound should still be crisp, clear and generally enjoyable.
Although some wireless headphones will only work close to the audio source, many allow you to stray across the room or into other areas of the house. However, keep your expectations reasonable and take range specifications with a grain of salt. Obstacles such as walls and closed doors can decrease wireless range to a fraction of its stated distance.
Long battery life.
Many wireless headphones can run for eight hours or longer before needing a recharge.
For Bluetooth headphones - good call clarity.
If you are going to be using your Bluetooth headphones with a smartphone to make and receive phone calls, it's important to be able to hear (and be heard) clearly. Some Bluetooth models -- especially those that place an emphasis on music performance -- don't handle outgoing calls very well.
Ease of use.
Consider what reviewers have to say about controls, their placement and how easy they are to use.
Headphones should fit snugly enough to stay put, but not so tightly that they cause discomfort. The pads should cushion your ears without overheating. Lightweight headphones will help prevent fatigue.
Two common complaints about wireless headphones are that they don't work consistently or that they gave out within weeks or months after purchase. Of course, even the best brands may have the occasional lemon, so warranty and customer service are important too. That way, if your headphones die prematurely, you can at least have a hassle-free return.