The speaker is very small and compact which is handy. It has plenty of volume and easy controls for adjustment, on, and off. The sound can be a bit tinny on higher volumes, not unlike what you would get on a standard cellphone speaker phone setting. If you use a phone in a car a lot, this would be a handy gadget for you, particularly at the price. People on the other end don't seem to get much extraneous road noise which points to a good directional type microphone in the unit. Others in the vehicle being able to hear and speak too is the big benefit over a standard bluetooth earphone.DNM