ACECAR Head Up Display Car Universal Dual System 3.5 Inches HUD, Speedometer OBD2 GPS Interface, Speed, Engine RPM, OverSpeed Warning, Mileage Measurement, Water Temperature, GPS Mode for All Vehicle

Posting this after using it for more than 6 months—no issues so far. It works just like a factory-installed system. Occasionally, the mileage shown on the heads-up display is slightly off (±2 miles), but that doesn’t bother me since I can still track my speed easily. I do wish it could display the road’s speed limit, so I wouldn’t have to look down at the dashboard for reference. Even a simple color indicator (like blue or red when exceeding the limit) would be helpful. That said, I understand this feature isn’t supported by the device. Overall, it meets the expectations I had when I purchased it, as i knew what is supported and what not.

Been 5 years since I have had this in my truck, still no issues at all, great cheap HUD option, tucked wires nicely, can unplug easily for smog checks or checking codes, display is nice, the only thing that stopped working was the RPM bar at the bottom, which was kind of annoying to have in the first place, so it broke to my liking, displays proper speed, proper battery voltage. Love it still!

I picked this one because you don't have to have all the extra garbage on your windshield. All I wanted was the speedometer. Simpler looks more stock anyway. I ran only the speedometer the first few months, only recently did I turn on the RPM line (pictured). I like having that option. I can add more too if I wanted, but overall, HUDs look better when they're simpler. If I want to know more about my car, I'll use my dashboard or bluetooth OBD reader. Instructions were simple, and in english. Not sure why so many are having issues with this step. Picture looks a little blurry but it actually looks better than that. On the brightest days around noonish, it is a little harder to see, but still visible. This can be alleviated by using the included darkened transparent film. After a weeks, I put the film on to try it out, but in the end, I removed it. I prefer the look of my windshield without the square on it and I really didn't need it anyway. At night, it's very bright. I took one star away because of the "auto" setting for brightness. I mean, it's the only real option unless you want to change it manually all the time. I feel the brightness should have several levels of Auto. At noon-time, at it's highest brightness, I can see it, but I feel like it should do better to be more usable in that scenario. On the other hand, at night, it's brighter than it needs to be. Brightness settings should not be 1, 2, 3, or "Auto." It should be Auto 1, Auto 2, or Auto 3, which each being brightest for daytime (because it'll never be too bright with the sun out), but a dimmer night setting. Like each Auto 1, Auto 2, etc could be a differently level of dimmness at night. That's a problem I find with most chinese electronics, not quite bright enough during the day, but too dang bright at night as if they're compensating at night for what they can't do during the day. Overall, I do recommend this, despite my one complaint. My complaint is common among all HUDs so if you had to choose one, pick this one. You will have to fiddle with the settings to get it calibrated to your vehicles speedometer but it's not hard, you just gotta read the instructions. Most of the bad reviews on here are because no one wants to read instructions. They plug it up and then complain.

**Started Strong, Ended in Disappointment** I was initially impressed with this heads-up display (HUD) when I first installed it in my car. Setup was straightforward, the display was crisp and easy to read, and it added a sleek, futuristic touch to my dashboard. For the first few weeks, everything worked flawlessly—it projected speed clearly, and made driving feel safer and more high-tech. Unfortunately, that honeymoon period didn’t last. After a few months, the display started glitching—flickering, freezing, and occasionally shutting off mid-drive. I tried checking all the connections, but the issues only got worse. Now, it won’t even power on. It’s essentially a very expensive paperweight sitting on my dash. For a product that showed so much promise, the lack of durability and reliability is a major letdown. I can’t recommend this HUD unless the manufacturer seriously improves quality control and support.

Pros: easy to install. Bright display (but see below). "Double reflection" isn't bad even without window film. Cons: The auto dimming feature just died after 2 months. It won't adjust, which means that during the day it is impossible to see because it isn't bright enough. The manual setting of 11 (brightest) would work, but then it is way too bright at night. Using the OBD method, it is hard to get the speed just right. If it is accurate at 30, it is off by a few MPH at 60 and vice versa. Not a real issue, but it's hard to understand why it doesn't just read the speed off of the car's computer. The physical design is not great. The cord is on the window side, and the rather long plug means you can't place it down low near the windshield. The adjustment switch is also on that side, instead of facing you, which means you have to reach around and work blindly to adjust the settings (and constantly remember that right/left is reversed from the instructions). The switch should also be on the other side. Not sure if it is just this unit, but unlike a 'real' built in HUD which appears to project the display out in front of the car/on the road, this one just looks like it is on the window itself. Still, not a bad item for the price. I would have rated it 4 if not for the problem with the display dimming.

Loved the HUD. This is the closest to OEM that you’re going to see. I read a lot of the reviews stating that they had to calibrate the device after plugging it in. I can’t say that I had to do anything. I used the OBD2 port to wire the device and ran the wire through the A pillar and down the door frame and installation took all of 3-5 minutes. The trick is to place the device around until you get the desired projection, mark it and then stick with the given sticky pad. It hasn’t moved, and I even have it placed in such a manner that it’s near impossible for myself or the passenger to see that there’s even a device there. Everyone that’s seen it so far has asked me if the car came with it. Read the instructions, and I can’t stress that enough. If you just plug this in with the USB cable, you’re going to have a hard time calibrating this to read accurate speeds. As for the display itself, I think less is always more. You aren’t going to find an after party HUD that looks like something built with the vehicle due to the messiness of information and lack of it being built into the dash panel. This is great. Reads speed, and even shows a freakishly accurate rev counter. Try it out, you won’t be disappointed.

Don't mind the 1 and 2 star reviews. All of the issues raised in these reviews can be addressed if they had read the manual and set it up correctly. Granted the manual is written in broken English or by Google translate, but you don't need to be a genius to understand it. The manufacture so desperately wants people to read the manual they included 2 copies in the box I received. I got it for $23 when it was on lightning sale. To address the 2 most often raised issues, OBD speed is NOT going to be accurate straight out of the box. To calibrate it you have to drive at highway speed and note how off the displayed speed is to your speedometer. When you're safely parked, hold down the scroll button till you see "1", which means option 1 of the settings menu. Press the button again and you'll be able to calibrate the speed. Roughly speaking, if the HUD is showing 65 mph while you are going 60, you would want to set the value to 107(default) - 5 = 102. The calibration value here is not 1:1 to the displayed MPH offset, it takes some trial and error to have it dialed. I ended up setting it to 103 on my Honda and Toyota. By default, the HUD will sound an alarm if you exceed 5000rpm or 93mph/150kmh. I have another HUD that lets you disable the alarm completely, but I haven't figured out how to do so with this one. If anyone knows, please let me know. I just set menu option 2 to 75 (7500rpm) and option 4 to 199 (123mph). Unless you live in Germany, you probably would never trigger the alarm after you set option 2 and 4 to max. I left all other menu options in default. If your car has auto engine start stop, you may want to extend the delayed shutoff timer (menu option 10) from the default 20 seconds to avoid the HUD going black when you sit at a long red light. Compare to my other HUD (https://www.amazon.com/gp/product/B01NADDHED/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1), the auto brightness on this HUD works much better. The other HUD has a poor light sensor and the display is too dark to read in late afternoon when the sun is hitting it at an angle. I haven't experience this issue with this HUD yet. The light sensor seems to be quite sensitive and responsive to changes to ambient light. I also like the simple layout of this HUD. The rpm strip is accurate and quick to respond. I disabled the white, blue, red lights so my windshield doesn't light up like a Christmas tree while I drive. With any OBD accessories, the HUD is constantly drawing power even when the car is turned off. When the display is off, the HUD enters sleep mode, which draws 20mA according to the manual. With a fully charged healthy battery, it should be safe to leave it plugged in for at least 2-3 weeks without completely drain the battery, but the manual recommends you to unplug it if you won't be driving your car for more than a week or so.

I bought my son a 2005 Nissan Pathfinder and he had asked for a heads up display to see the speed since the Pathfinder had analog gauges. The 2005 has OBD2 and didn't think I would have any issues. I go and plug the unit in and it powers up and I try to get it set to MPH but it will not get off volts and after 30 seconds it restarts. I read the troubleshooting guide and that says if that happens its not an OBD2 and it wiull not work. I test it in my 16 GTI and it works perfectly and after 1 second it auto goes to MPH and the tach works also. I'm not sure why the deal is with the connection to the Pathfinder. I spent about 45 min trying to get this to work using the OBD2 port and then tried using the USB and satellite function and still had issues. Its too bad, the unit looked great and super bright in the daytime. I gave it 2 stars since it did work in my GTI but was supposed to work with any OBD2 port which is not the case.

Very simple to connect. The display is pretty easy to read in most conditions - a bit too bright for night driving sometimes. Had to adjust the speed ratio to get it to match the car but no big drama. Speed display tends to lag a bit but is only annoying in city traffic and is very usable on the highway.

It really does work well, take a little to set up, however it caused my vehicle tracker connected to the same old to malfunction, in go’s mode it is slow to keep up with changes in speed.

I had to finetune it for the correct speed and now it's working great. It's less visible but still can see it in the day, and at night it's perfect. It took a couple of tries to put the mirror sticker on the windshield so I was left with bubbles. Contacted sellees but they were not able to send replacement, but made up for it a bit. Overall I'm happy - I wish I could see it more clearly in the day and that it would come with multiple stickers. Also to have it positioned in the right place for me, the wire has to be out and visible and in my Camry, that means blocking the car clock q bit.

Initially, I was not really impressed with this and I was contemplating requesting a RETURN and Refund. The main issue was that unit ships in a state which will NOT auto power down! The base unit itself would remain lit and the backlighting of my 2018 Sport Night Edition, 6-gauge dash cluster with 7” LCD central info screen would stay ON !!... This was indefinite and would of course be a Battery KILLER! The supplied “leaflet” has poorly worded instructions in a barely readable tiny type font! and using the all-in-one single button/Jog dial for altering the unit's settings feels counter intuitive. After a lengthy and rather frustrating trial and error set-up period I was able to FINALLY get it right. This will (for RAM Classic owners) require you to get to menu item #9 and set voltage to 13.2 volts) Once you have managed to navigate this convoluted process your unit will Auto off when your dash cluster cycles through the vehicle shutdown process. Ok, after that long bit of frustration aside.. The “POSITIVES”... - Did not cause any info anomalies on the Ram Classic dash cluster and did not throw any OBD error codes! - Base Unit is fairly unobtrusive and neatly nestles onto the first ridge in the upper dash of the Ram “Classic” just behind where the VIN plate is located. For me, this location also provided what I felt was the optimal projected image unto the windshield. This location also allows for the complete concealment of the connected cabling. - Speed and Info appears to display accurately which should be expected since its just pulling OBD info. - Projected image seems bright enough in sunlight and auto adjusts as conditions darken. - For the money (once the set-up is sorted out) this is a decent, functioning useful piece of gear. The “NEGATIVES”... - There is a slight “double-image” in the glass. No amount of repositioning of the base unit will eliminate this as its an issue of simple physics! (Ie: Windshield safety glass construction) However, I have not made use of the supplied screen reflector yet. I am trying to avoid affixing anything to my glass at this point. - TERRIBLE instructions! A little bit more detail may have taken 1 hour of frustration out of the process. I was almost at the point of wanting to call Amazon to request a refund! In the end, this was almost exactly what I was hoping for! I had been used to having a HUD in some of my prior vehicles and I missed having one. This unit allows me to leave my LCD cluster in the “Fuel Eco.” Screen or “Tire Pressure” Screen while projecting my Speed into the windshield glass. I set the unit to be as clean as possible by showing SPEED ONLY.. (No bar graph or useless dots) I have to say that this thing is fantastic during night driving. After getting the unit to now properly power down I am going to up my rating to 4* where it would have been 1* (ZERO) if I had ended up returning it. At some point I may try using the supplied transparent reflector screen to see if it cleans up the image a bit and will report back if I think it affects my rating. For now, the image is acceptable to me. Sorry for the LONG RAMBLE, but I hope it will help 2013-2019 RAM "Classic" owners to get the most out of this product. One final note: I did not attempt to use this in the USB powered mode at all and can offer zero input as to trying to use this in that way. As far as I am concerned, the whole point of having one of these is that it can function and gets its required power simply by connecting directly to the OBD port.

Everyone should stay away from this. The speed displayed by the heads up display was not correct (about 5-10km/h off). The main malfunction I experienced was a multitude of error codes when my mechanic preforms an electrical systems diagnostic caused by a short in the port this device was plugged to. I will be contacting the company for support and returning.