I wanted something to eliminate all of the cords everywhere. Every pair before these I have purchased from REI. All my friends are jealous on me lol No jack at all. Since the width is also adjustable, I was able to fit two in her closet and I adjusted the height of the rod so it was about six inches lower. Tying the bracelet on to someones hand takes a lot of time- especially when you are using an elastic string! In fact, got some of those cord management sticking things so from the desk, I just see the three plug ends and I connect as needed. They are, however, comfortable enough with a pair of sport socks to use as indoor slippers. I am very disappointed in this product. The ones I originally wanted were almost $300.