Nude Audio offers a new line of portable Bluetooth speakers called Move with three size variations, S,M,L, which stands for small, medium, and large. I received the M model to review. It is about 3 Â¾ inches square. This portable speaker delivers a crisp sound so much better than a tinny phone speaker that it is a nice asset to have in your home, garden, at a barbecue or on a boat. It has a cord attached so you have hang it or wear it around your wrist.