do not waste your money on these broken unitsinstead goto plxdevices and order a good stand a lone AFR gauge kit

Well worth the money to purchase this gauge

Don’t waste your money from them

Don't waste your money

Don't waste your money.

I get.2nd Update: I contacted Amazon and they agreed to refund my money

and id really like to have a working afr gauge since i paid good money for it

They did not refund my money or respond to further emails about the issue when I asked them to explain themselves or offer me a 'good' o2 sensor if they were going to insist every one I bought was bad