For what it's worth; I bought one of these recently, for the bike.
Temporarily running off a battery pack used to recharge cell-phones I have a proper voltage reducer on order so I can wire it into the bikes power.
For the price, the 1080P video is very good quality. Because of where it's mounted, the wind noise obliterates the engine sound at speeds over 20-30 KPH.
I'm playing around with a small wind deflector at the microphone location in an attempt to improve that sound quality.
I was impressed enough with this little camera that I bought a second one for my vehicle to use it as it was designed for initially - a dash-cam. I draw a distinction between "Dash-Cams" and "Video cameras" - that's another topic.