I have reviewed a lot of Bluetooth Speakers, and I remember there was a while where I was reviewing one either every day or week. I have reviewed the Bluetune Solo before from Divoom, and I admire the Bluetune Bean.
The Bean is a pocket sized speaker that has a clip on design thanks to the metal carabineer belt loop, that is presumably for a belt buckle. It can connect to your phone via Bluetooth 3.0, and is good for up to 10 meters. There is a rechargeable battery that provides about 8 hours of listening time.
I look forward to trying these out for myself, and I wonder what kind of sound it will produce. You can get it on the Divoom site for approximately $29.99. That is pretty low for a Bluetooth speaker.