I bought one at a Sam's club several years ago, called "Think Ware Dash Cam." My only complaint so far has been the fact they want you to use your computer to download a manual to set or operate it,,, instead of sending a printed copy. How can you use your computer,, wired in your house,,, to adjust the settings,, while it's turned on in your car? I hate wasting a ream of paper & a whole package of ink to print my own manual. Especially when a lot of it is wasted on different languages etc.
But it operates fine, (even thought I've never been able to re-adjust the time stamp,) in recording activities, and if a bump or jarring event occurs,, such as an accident, it keeps that event in it's memory bank, as well on the removable micro SD card.
I used mine once,, when I was sitting at a red light, behind a car. The car in front of me, when the light changed, pulled her car in reverse, backed into me, then drove off. I followed,, all while calling the police. When we got to her house,, I stayed away,, but she confronted me wanting to know why I was following her. I politely replied, it was because she'd backed into me. She denied it & threatened to call the police. I told her I was on the phone with them at that moment. (Which was also recorded.) She got a bit belligerent,, and I backed away to my truck, which was blocking her driveway. The cops arrived & she went into a tirade,, accusing me etc. I politely asked the LEO's (two cars had arrived,) if they wanted to see the recording. One was talking to her,, while the other one took my SD card & looked at the evidence.
When confronted by the LEO's,, AND the FACTS,, she suddenly changed her tune. The damage was minor,, (broken front tag & cover,) and the LEO's & I discussed the options. I said; "If she'll apologize, for hitting me, AND for lying to all of us,, as well as pay $20 to replace my tag stuff,, I'd let it go.
She did.
The LEO's & I had a very pleasant conversation afterwards & they complimented me on my calm attitude & the way I handled everything.