Autool Car OBD Head-Up Display X50 Plus Multi-Function Smart Digital Meter & Alarm Fault Code Water Temp. Digital Display Speed Gauge Support 12V OBDII Vehicles

Display is great. Large, easy to read, bright and with colors. I use it in my truck since the temp gauge is inaccurate. Speed is a little off, though. It refresh the screen every second or so and it takes a sweet while to update to the current conditions (like 5 seconds), so, don't rely on the speed.

I bought it for a Mitsubishi Montero but it doesn't work, possibly the protocol isn't compatible, in other vehicles like Toyota it works fine

Plugged it in to one car wouldn’t work.Plugged it in to another car and caused and ABS light and still didn’t work. Wouldn’t recommend

The thing that I liked was the device’s audio alerts for water temperature, as well as the car battery alert

Not the most intuitive to use. The wheel scrolls through the menu selection and pressing it in selects. Basic readings. I was surprised it reads and clears codes too although I wouldn't use it for that, it's just to monitor the coolant temps and voltage. Cars today have such limited dashboards. The squarish shape could make it hard to find a nice mounting spot so check out your dash before buying.

Love this device! Temp gauge went on my 03 Subaru Outback and this is even better! Super accurate compared to my OBD2 advanced diagnostic tool. Love that it also reads codes.

Práctico y fácil de usar.. muy útil para los carros que no marcan temperatura

The company who makes this unit really Surprised me and got this problem Fixed! Kept E-mailing back and forth trying things and finally, They sent me a new circuit board I had to install to try and it worked! It comes on automatically when you Start / Stop the car. The little unit is perfect size and display on the dash. I use it to monitor the water temp. It turns red and beeps at whatever you have the set point you want it to alarm.This unit has already saved me after thousand dollars or so of major engine work , of which one of the repairs was a warped head from overheating. I was driving it for the first time after all the repairs, the dang Radiator Reservoir Tank Cap Failed, Fell apart and closed shut and did not vent. Pressure built up and finally blew the cap off in pieces. Never seen one do this. The little Display beeped and turned red at 221F (which is default alarm setting) and pulled over immediately and prevented frying the engine and warping the head again! Very Impressed! You can Monitor and choose 4 different readings. The Display reading from the Amazon PIC shows a pretty Colorful Bar Graph at the bottom reading the Manifold Pressure and turns from green to Red as you put your foot into it more. The slower you drive and save gas, it stays green. You can change this if you want.I only have one little problem with it now, the reason for the 4 Stars, as the Display stays on DIM all the time. It has 2 auto Brightness adjustments which automatically DIMS a little at night. During the day you need it to stay on BRIGHT but the little Light sensor is recessed into the unit and does not get a good look at the light. Not a big deal and can still read it in the day. I stuck this on the Dash with a little piece of Velcro which is the best place for it and worry about the sun beating down on it with the car off and windows rolled up in the summer. It can get 130F inside the car. I am not sure if all future units that are ordered, will be corrected from my problem, but I can say I had excellent customer service and they will try to help. They have sites on Facebook, You Tube and Instagram.