Review on Universal Car HUD Head Up Display With Digital GPS Speedometer, MPH/KM Acceleration Time, Compass, Altitude & Driving Distance Monitoring - Overspeed Alarm HD LCD Display For All Vehicles by James Turpin

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.