Aceshop Auto Car HUD Head Up Display KMH & MPH Digital GPS Smart Speedometer with OverSpeed Alarm Fatigue Driving Warning, Navigation Compass, 5.5'' LCD Screen, USB Plug & Play, for All Vehicle

It’s ok but you have to manually adjust it from a trusted speed source. Once done it’s spot on. I only want it for the speed but it does quite a few other things too. You will need a magnifying glass to read the instructions 😂

My speedo cable snapped in lhd vehicle, was struggling to source the lhd longer cable in the uk so bought this to use in the interim.Hell, i am keeping it as Primary speedo. Its operation and display is fantastic! You wont be disappointed with this item

I'm a gadget lover, but I didn't buy this just because I liked the look of it or it's other features, I actually brought it for a specific purpose, and that's to keep an eye on the speed - on which this failed badly. I am a driving instructor so I got this to stick on the passenger side of the vehicle, which is where I would be sitting when instructing, so that I could keep a check on the speed of what my pupil is doing when on a driving lesson.The speed I actually got working, mostly by trial and error as the instructions are so terrible (and small) that I couldn't get any of the other features to work accurately. However the product is such poor quality that even the main speed display isn't that clear. I could have lived with that had the speed have been displayed accurately. The speed wasn't just a little bit off, it was way off. Being a driving instructor that is the one thing that I can't have wrong so this went straight back I'm afraid. For the price they are charging it's a complete waste of money and nothing more than a glorified toy. Save your money and try and find something that actually works properly, even if you do have to spend a bit more.

Very good easy viewable day or night

The reason I bought this is because it was going to cost me £70.00 parts plus a nightmare job to fit,( new speedo cable that is.) so easy way out was this, no. Plug and play, yes, easy. Driving down the road it registers at least twice your speed , can’t seem to calculate it, so going back. I will try a different one and let you all know. Merry Christmas.☃️🎄. Paul. 1993 Pajero.

The update rate is slow, the display is not clear, and importantly the speed is wrong. The unit does not retain mileage once the car is turned off (useful for business mileage recording).

The kids like this more than it’s useful but it’s a good gadget and can be handy in the average speed camera zones to keep an eye on the speed easier than looking down at the speedo.I find the design and the look of it too basic to keep on the windscreen, using my phone for satnav means I’d have two devices up there, the led display is t that clear to read at a glance if the light is shining across the screen, I’ve found the best positioning is down propped up in the ash tray bit with, dare I say it, a bit of blue tack behind it. This makes it easier to read although you have to look further down than the speedo.The accuracy seems spot on, a fraction of a second behind the real-time speedo which is the same as the satnav and understandable.The different modes are good to choose from in that you can have just the speed and keep it simple, most of the information is unnecessary like the longitude latitude positioning but it’s cool for the kids to see that stuff and the progress bar is a better visual to look at and makes it more interesting.I’d prefer a unit that blended in more to the dash but it’s a good source of info.

While this is billed as multi-function gadget, in reality the other functions are pretty superfluous. That said it’s main function of speedometer actually works very well, and I tested it for accuracy against the cars speedo and another gps system and it proved to be relatable and responsive. The big virtue here though is the display, which is large, clear and easy to read (in most light conditions: see photo). It is a useful device if you really need to have an accurate indication of your speed at all times (as opposed to using your car’s speedo which, compared to this, is far less noticeable or prominently displayed).So, in short it has limited use/functionality but it does its primary task very well. Price wise it seems about reasonable.