This will work with my smartphone right?
You did not say which brand of smartphone you have, but most smartphone will work with our MIC.
It uses 1 Lithium Battery What is the exact size of battery exact description battery
To give you the exact size I have listed them by millimeters, which is the most accurate: height 69mm wide 18mm diameter 60mm, but if you need inches: 2.7 inch X 0.7 inch and diameter 2.36 inch. I hope this helps you.