OTPerformance M1 - White Windshield Projection Heads Up Display HUD Digital GPS Speedometer with Speed, Suitable for All Vehicles, Travel Direction Function, and Overspeed Alarm, Fatigue Driving Alarm

Great Product For The Price. The Color Matches My Gauges Good. It's Clear And Bright. Helps Keep Track Of My Speed In MPH Since My Car Is JDM & Is In Kilometers. Photo Does Not Do Justice

I bought this because my Jeep has jacked up tires and it was never calibrated for the bigger tires, so my speedometer is wrong. This one works well and I really like that it projects onto the windshield. However, it shows 2-3 mph faster than what I am actually doing. I guess it will keep me from getting a ticket.

Speed is constantly off by 3 to 5 mph. I’ve adjusted the satellite and everything possible it doesn’t change

Hell yeah

We ended up returning this item. The cord from the USB made it clunky and awkward. Cool concept, just not for us.

Yiu can see the speed very clear and it is mph correct 👌 great 👍

It seems to be off by 2 or 3 mph. It calculates a little higher than the actual speed driving.

My truck's speedometer area LEDs burned out years ago, and night time driving speeds had a bit of mystery to them ;) Didn't want to spend $500+ on replacing whole dash panel. While there can be a slight lag in speeds updates via the GPS feature in use, this sure beats guessing. This device has resolved my nighttime speedometer illumination issues.