SinoTrack HUD GPS Speedometer Universal Car Heads-up Display 2.7inch MPH Speed Meter with Compass Over Speed Alarm for All Vehicle USB Connect Plug and Play

This GPS works very good and is very accurate. This was a very good buy and I am not disappointed with it. It has a big face, but I would say, it's the best size for my pontoon boat.

Great GPS speedometer, I put it on a 1977 moped without speedometer. Bought this one because it's the only one on amazon that can be calibrated, after setting the calibration to 97 (three mph slower) it's spot on. But greatly lacks one thing... It has NO way of mounting accept a little sticky pad, so my solution was to very carefully drill a hole through the back and slip a zip-tie through and presto, easy mounting. The auto dimming is also a big plus to readability, but the setting menu is a little tricky. One last thing is it makes a very faint high frequency sound, which probably isn't even noticed by most people.

Works good, only complaint is the slow starting when you first plug it in, but it seems pretty accurate speed wise.

Love it.

Put this on my Goldwing gl1800 because the factory speedometer is about 3 to 4 and 1/2 off miles per hour. I STILL had to calibrate with a Garmin to really verify actual speeds. When it working, it's awesome. But sometimes it takes about 15 minutes to get a satellite signal.

bought this as a speedo for my motorcycle. I have a USB charger wired to by battery that powers it. I tested it in my vehicle out the box and it required no calibration. Had a went the proper avenue of wiring in a speedo at my local shop it would've ran me at least $600. Has great visibility day and night.. Will add video later.

I wanted to like this and was willing to wait a bit but after 7 minutes…. Nothing!! I stopped taking pics at 4 minutes. I have the windshield display one that picks up satellites immediately but don’t like double vision at nights so I bought this one which don’t work. I hope others have better luck.

i wear bifocals, so iwanted a heads up display to keep my eyes on the road. not having to look down at the odometer to ck my speed. i drive an electric car and have found that sometimes i get going too fast for the limit(my car is so smooth). i use ‘one pedal’ driving. easy to set up. plenty accurate. the wire doesnt look too intrusive. just what i wanted…

Muito bom!!

I gave this Speedometer attachment to my Friend and he Says it Works Perfectly and is Accurate . Update : They work Great for a couple months and then Quit . I have another friend who bought this same Speedometer and hers quit too . So that is two that just Quit for no reason . My one friend ordered another one and just got it , so he’s Trying it again . Hopefully it will work longer than the other one and my Other friends .

Very good for the price you pay. I would consider using a better USB cord though because it ripped overtime

Works well even in bright lights and gps is fast and accurate. Compass was a bonus.

This speedo is being used in an older model vehicle which does not have a working speedometer. It is very helpful in a case like this, was easy to install and operate.