BookStream is another great wifi speaker released for Smart-phone. I never through for such a unique design. It is a bit costly, but the speaker is rich in quality. It is a wireless speaker that sync quiet easily with any kind of smartphone and gadget. There are quick play pause button on the top through which you can control the speaker as per your need. This device is just announced and termed around $99. I am not sure about the exact price, but willing to find from where I can buy it.