taco eater :
Countryobtunning from Princeton , MA United States
2/28/17 It does what it says it reads you the head temp. Only issue is when removing the sparkplug I get worried because the threads never lossen up until completely out. also the reset button is on the back so it resets on its own without you pressing reset sometimes.
The guy below me is just not being careful enough. Iv had my gauge for 6+ months now ( I used it in my grow room in the winter even lol). Yes I also pulled the wires from the terminal but it was simply fix with some soldier. I rode mine in 30 degree weather no issues and I'm planing on using the same one this season.
Update* its been about 10months & still works perfect, it actually saved my ass today! I'm planning on configuring a tiny pack for it after the sealed one dies.
May 24 2020 Still works great lol
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You need a resistor plug
December 5, 2018
taco eater :
CHOOSEDEATH from San Jose, CA United States
I've ran two of these and both crapped out. Found out that you gotta run a resistor plug so the electrical noise dont fry tha board in the gauge preventing it from telling the temperature
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not great in cold weather
November 17, 2018
taco eater :
tom. from Lancaster, PA United States
Any temperature below 35 and the whole right side of the display goes blank, then works great again when the outside temps come up.
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Go back to the old style
September 21, 2018
taco eater :
EDWARD MANHART from OMAHA, NE United States
These work to tell the temp, but the new button feature is trash. And if you run it too close to your spark plug wire, it goes crazy flashing from temp, to time, to max. Nonstop. ....It connects to your spark plug, i cant get it far enough away! PLease go back to the old style without the clock and button.
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I don't care what time it is.
August 13, 2018
taco eater :
Ashley Ackley from minneapolis, MN United States
If i'm eagle-eyeing my temp gauge on a new tune I can't wait 15 seconds for the temp to come back around. The button is nearly useless. I wish there was a way to lock it in.
It works perfect 
You need a resistor plug 
not great in cold weather