I LOVE these Bluetooth wireless headphones! I have two pair and will probaby order a third because I'm afraid they'll stop making them. Granted, they have a cord that connects left to right and you might think this is dated technology (maybe it is). But two features puts this over the top of any other brand I've tried of separate earbuds. And they are equally important to me.1) They will pair and stay connected simultaneously to two devices (auch as iphone and ipad). You do NOT have to disconnect Bluetooth from the first device in order to connect to another. It will only play one device at a time, but you don't have to disconnect and reconnect. Super convenient. I LOVE this feature because I switch back and forth all the time (not sure how this works with Androids). And,2) There is a volume up and down on the same earpiece (right). Granted, they are corded to each other, but I often, in fact mostly, listen only with one earpiece in. I tuck the earpiece I'm not using in my shirt (left). I also like the tactile feel of the volume up/down which are separate buttons and different from the center button of on/off/pause. I really dislike individual earbuds where the right earpiece is up volume and left is down volume. Nor do I like the feel of "smart touch" earbuds.So, for my needs, this is a clear preference!