Aceshop Auto Car HUD Head Up Display KMH & MPH Digital GPS Smart Speedometer with OverSpeed Alarm Fatigue Driving Warning, Navigation Compass, 2.4'' LCD Screen, USB Plug & Play, for All Vehicle

Very happy with the purchase. Looks good. Most important is that it is accurate and the connection is fast and easy. The USB cable is very long, so can reach the back lighter socket port. Be aware that when driving under the bridge, readings are not so accurate. Overall very happy.

How can a GPS speedometer be so inaccurate? It is just mathematics, so why is it reading so far over? The old-fashioned gear driven needle speedo in my vehicle is more accurate! At 70mph on a flat, straight road with a better sky view than my phone this is giving me well over 80mph, where the speedo in the car is giving me around 73, and waze on my phone starts giving me the overspeed alert which is set for zero tolerance.Popped it into a company vehicle that has a calibrated speedo for law enforcement, and GPS speed with external antenna on the video system, and this still gives the same kind of overage.There is a positive, it is quick to lock on even from cold start.

This is a fantastic product. Looks good and is accurate. I was going to get a software upgrade on my dash to show an electronic speedo. I won't bother now. This covers all bases and is way more accurate. Plug and play. Can't go wrong.

Not worth buying. I wanted something to help with monitoring my speed after getting two speeding tickets in a matter of weeks. It has a large display so u thought this may help. just use the speed monitoring your car, no need for any other gadget! Also, it fell off the dashboard after a week anyway! Feel an idiot for buying it really

For pricing you can not beet the product all so what it covers in a small product is fantastic not just speed positioning is Accurate for satellite keeping you awake if you feel droise it's actually has 12 different functions. 😉 well worth the money 💰R