The earphones dont fall out easily on the ear, even if I dont shake my head, it seems that my choice is correct, each of them can work alone and connect to different devices. They also sit pretty comfortably in my ears, too. Works like charm. My first issue with the valve is to be honest its just not that comfortable to me. You control it from the cell phone or computer. The black ones seemed short and much tighter. I must say Im a naturalist guide in the Galapagos islands. First, the sound is amazing! Sound is good and theyre comfortable, but thats after Ive spent nearly an hour every time trying to get it to pair with my desktop. Seems like a bunch of junk to me.