I got this just in case someone hits me or runs a red light or stop sign and I hit them to prove what happened. This camera is small. BUT it is very easy to use basically just plug in and go. If you need to keep a recording press the orange button and later you can just go thru the menu and see it. The battery when it is not plugged in is very short. About 4 minutes or so. But you can leave it plugged in the car and show a police person if they would need to get in and see, or you can plug it in your computer and see. The picture quality is very good for being so little. I can not say about the microphone as I turned it off since I listen to music all the time. But the picture all by itsself would save you to prove something if needed.