2023 Universal USB Digital GPS Speedometer with Compass,KFZMAN 2" Car GPS HUD Head Up Display in MPH KMH, Overspeed Alarm,Fatigue Driving Alarm for All Vehicles (Mini-Sized)

All the newer cars have digital speedometers, that I have gotten use to. Wife’s older car doesn’t and speedometer is hard to read in bright sunlight. This device really helps

On a highway with a speed limit of 65mph, the error is 5mph-10mph. For example, if my dashboard is turned to 70, it shows that my mph is 80-85, rubbish🚮

It was great, but couldn’t use on my daughter’s car. Her voltage was too high

Does not seem to be able to maintain gps lock very well.

This unit was purchased to compare with another brand I had concerns about and this item worked just fine in every way.

Left four hours plugged in and still did not get a signal. Finally after 5 hours it started working , but is was way off on the speed

Alto nivel de precisión en velocidad, desde que lo uso no me han vuelto a cargar foto multas injustamente.

For five years I have believed that the speedometer - and likely the odometer - in my Ford C-max read about 5% high. I was first alerted to that possibility by several of those municipal speed radar displays that the police like to set up to warn you to slow down. They always said I wasn't going as fast as I thought I was. Curious, I tried the time-honored method of using a stopwatch and the mile markers along a stretch of freeway. Not a real accurate method, but in five reps, it sorta confirmed what the radar signs were telling me. So what? you say. Well, I got comfortable driving by real radar run by real police a few mph over the posted limit secure in the belief that I wasn't actually going as fast as my dash said I was.Recently I discovered this digital GPS speedometer, and I got it to further confirm the inaccuracy of my Ford instrument. It's not all that intuitive to set up, but I think I finally got it. It's a little awkward to use for now as I don't want to glue it in place until I know it's working. So the cord flops around, and the unit wants to flip over, but I got to where I could read it and set up on a test run. Guess what. It confirmed that my speedometer is very accurate, and the paranoias I thought I had lost have returned. It's fun. I recommend it.