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 Rudolph Mceachern

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.