G4S Digital GPS Speedometer, New HUD Car Head Up Display with Digital Speed in MPH KPH, Universal Fatigue Driving Reminder, Overspeed Alarm Trip Meter, for All Vehicle (White)

Shows accurate reading, the display is good even during the day. Amazing for the price

Terrible, Not accurate at all. The speed difference is more than 7KM per hour, and i bought two of this product for my vehicle and both of them are not accurate 👎🏼👎🏼👎🏼👎🏼👎🏼

I have American spec car having speed in miles so this device have km options that solves my problem in very low cost and it can be fixed at many places that can be accessible and won't divert your concentration while driving

Product works as described a tad difficult to see on a bright day if mounted on the windscreen. Speed needs to be calibrated default setting is off by + 5-7 kms .

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Excellent but not accurate

Great 👍