T600 Universal Car HUD Head Up Display Digital GPS Speedometer with Speedup Test Brake Test Overspeed Alarm TFT LCD Display for All Vehicle

So far so good. Mine came with the speed calibration set to 107%, had to tone it down to 102% but now its quite accurate. I wanted something to show the speed in MPH and was also looking for something to show voltage, and this device happens to handle both without issue. Unit is very light, and fairly small, but seems like its built well enough. Ill update this review it I have any issues.

The media could not be loaded. Plug and play, works great. Works much better and is more accurate than an app on your smartphone. Very accurate, it is within a couple of mph of my dash odometer which is perfect in order to avoid trouble with the police. You can set one alarm and if you go over that speed limit it will beep about 2-3Seconds to alert you. I highly recommend. I leave it plugged up as my cigarette lighter has no power when the car is off, check your car and unplug or get a switch to turn it off if your power does not shut off.

I ordered this for my JDM Honda Acty as that speedo is in Km/hr, and not MPH. The first unit recieved did not connect to any satellites as it was defective. I decided to swap it out with a replacement and that one worked as advertised - I didn't even have to celebrate it as the speed was accurate out of the box. I typically connect with 10-14 satellites! Let's hope it lasts....

Super easy to set up and operate. I like that you can adjust the brightness to your comfort level. It is very small, very light, and a low profile on the dash. The readout is easy to see if displaying only a couple of the features, if displaying multiple readouts it gets harder to see all the info , I have it placed up close to the windshield so if you like it closer the readout would be easier to see. I had a different size tires installed and wanted to check the accuracy of my dash speedo. The speed readout is super fast, I picked up 17 satellites (wow) and the accuracy is excellent. Would have been a plus if the kit had included mini usb to type a usb but it only has mini usb to cigarette lighter plug. Very happy with this purchase so far. There are several kits available for hard wire install on Amazon if you looking for that pro install look.

I live in Denver, CO, USA. no clue what 1700 meters is. MPH works great but altitude is in meters and you cannot change it. So close but so far from usable. Please upgrade the firmware to include feet and i will re-buy.UPDATE - 2.14.2019: I did everything they asked and they did not send me a sample. That was all for show in there response. I also bought a new one, because it advertises that it does feet now. That is not true, It still does not do feet.UPDATE 2 - 4.19.2019 You can now change Meters to feet. Works Great. A little lag when speeding up but nothing bad, normal for GPS. Also the new version has more display function options. As well As more display color options. I changed my review to 5 stars because if i bought i today I would give it five stars. Even though customer service is a little lacking.

This unit has some compelling features. For example, for me, its size and the ability to mount it on the top of the dash right near the windshield makes it (almost) the ideal solution. Unfortunately, it's accuracy leaves me scratching my head.As others have mentioned in their reviews, initially the readings compared to 2 other GPS's was pretty far out. No problem, sez I, I'll just adjust the setting in the menu and that will be that. Not Quite.I spent a fair amount of time doing the adjustment, and yes, I was able to adjust it to exactly match the other 2 GPS's at highway speed (60 -70 MPH), but it was off at low speed. So I readjusted it at low speed to exactly match. Again, perfect speed match at 25 MPH, but off at 70 MPH. The bizarre thing is, it can be too HIGH at high speed and too LOW at low speed! Or, too LOW at high speed and too HIGH at low speed, depending on how you adjust it. Really weird.The best i can do after way too much time playing with it and fudging the adjustment at one end or the other is good accuracy at 70 MPH, and off by about 1 MPH at 25. (Or the other way around). The "turnover" point is somewhere between 40 and 50 MPH - above that the error is in one direction, below that it's in the other.Now, normally I wouldn't make a big deal out of an error of 1 MPH. However, this thing's supposed to be driven be a GPS device, and at a constant speed they just aren't normally consistently off in one particular direction (or change the direction of error at some point).I recently threw together a GPS display using a Wemo D1 Mini, a GPS module and a small display, and never saw errors like this unit has. (In the first place, there was NEVER any need to create a method to fudge the speed display, because the speed from the GPS module is a given - unless you're not tracking enough satellites, or there is multipath or a weak signal, the speed is the speed, and you don't have to compensate for anything in the unit.)So, I don't really have a clue why the speed error is there, but I'm wondering if it has to do with rounding errors in the display routine - instead of rounding to the nearest MPH perhaps they're truncating the number - who knows?Anyway, as I said, its a compelling item. I just wish I could believe the displayed speed a little more.

I am re-building a 1989 Jeep YJ and with the new motor and tranny it needs an electronic speedometer, that runs $350. and did not have the money at the moment, so I was using my phone to check the speed, but that is just not practical, so I tried this HUD. It works very well, have tried it in my other vehicles to test the speed and distance. It is spot on. I also have oversize tires on the Jeep so I would have to re-calibrate the speedometer to read correctly, with this it is GPS run so no problems with false speed. The best part is that it does so much more then a regular speedo and fits very nicely on the Jeep dash, which is a small ledge anyway and is easy to read. Very Happy.