H2 Digital Speedometer GPS HUD Universal All Cars Head Up Display Vehicle Speed Compass MPH KMH Speed Gauge Plug and Play

This speedometer works great for a go kart build. I didn’t want to deal with the hassle of wiring an expensive and complicated speedometer to my go kart that I built. Instead I found this speedometer and whenever I want to drive my go kart I just plug in a power bank and start driving. It seems to be very accurate and has given me zero issues so far. Great value, easy to use, and the brightness is viable even during the day.

very cool

Reads about 1 mph to fast, but I prefer it that way and besides, the speed CAN be easily calibrated. As far as how long it takes for the unit to catch the satellite signal that some have complained about on here, it takes no longer than any stand alone GPS unit. Some don't realize that when they use their phones and such for directions and everything is pretty much instant that that's because their phones are already on and connected to the satellites. The only thing about the unit that I don't like much is the mounting area is way to small. It near a larger area or some type of an actual "mount".

This is excellent. Heads up position is great. Perfectly synchronized with car speedometer and gps speed on phone.

It's okay

I mainly wanted it for the compass and got the speedometer as extra. The display is bright and colorful and accurate. I live in the country and have had no problems with it connecting. Time will tell on the durability.

This little compass fits right on my car's dash and plugs directly into my USB port with the LONG included cable. Works great, takes very little time to triangulate on the go. And the price, under $20, was great, too!

Does it’s job for the price!