ACECAR Digital GPS Speedometer, Universal Car HUD Head Up Display with Speed MPH, 100 KM Acceleration Time, Compass, Altitude, Driving Distance, Overspeed Alarm HD LCD Display, for All Vehicle

I tested the first unit with it sitting on my desk, it stopped working after a short time, dead - nothing. I tried several other power cables, no joy.When the second unit arrived, I carefully handled and tested the unit on my desk.I tested my existing Micro USB cables with a phone and a tablet, flexing and moving the cable near the input, there was no connection loss.I used the included USB Micro USB cable as well as mine. with the GPS Speedometer.I quickly saw the loss of power when moving the cable around, not rough, but enough to check for connection.It appears to me, the Micro USB connector in the GPS Speedometer may be a problem.I took a chance and used (removable) hot glue to secure the connector to the unit. The unit worked OK on the desk and then I installed it on my golf cart.It worked fine, no power loss.The compass, the GPS and clock all worked perfect. The speedometer was accurate to within 1 mph from 1 mph up to 25 mph.I can't seem to set the clock to 12 hr format.After some minor issues I'm satisfied.

I got this for my bike because my speedo was way off. It works it does what it says it will do. But I found the instructions to be a bit confusing. And during the day could not see the display. In the dark worked great. It was 1 to 2 mph slower compared to my phone and my phone has never been wrong comparing to those this is your speed signs. So take this as you will. I am not bashing this just needs some tweaks and it could be a good product.

Finally, I get to plug this thing in against Speedometer, Waze, and my 2017 CR-V. This speedometer is off by +2 mph when running on the highway. When going on local street, you could never tell because the speedometer showing the number jumping up/down randomly so you could never be too sure if you gonna get pull over for speeding.Overall, design is great. Color is simple yet nice. This device doesn't always work as intended and defeat the purpose it was created for. There's definitely room for improvement. Bought it on June 25 so I don't know if it's still returnable.

Its very small.. Don't be fooled by the pics. 3M mounting strip is useless and did not hold.. I had to use Velcro. Very confusing set up with one toggle button on the top. That one button sets up everything and does not make the process easy one bit. Brightness is pretty decent but it will look better at night. For the price I wouldn't purchase. It's super cheap. Runs off satellite to calculate speed. That part is just ok..

The instructions are so tiny I could hardly read them.

seems good so far only owned for few days instructions are not the best had trouble setting the wright time!

Uses GPS to calculate speed and is spot on. Bright so it can be seen easily. Has a speed setting which beeps to warn you about going to fast (you set the threshhold). Since it is eye level, you can easily see your speed. I use the speed and time designations (other settings are adjustable).

So far, so good, works very good, very accurate.