If its cheaper than what walmart offers, there imported China product.
Probably no support and no warrenty. Typically such products from china etc, have vauge instructions as well.
Spend the money on some quality gauges and you will be happier in the long run. Warrenty, fit n finish, support will be something that you pay for but will be glad you have IMO.
For me its hurt everytime Ive had to buy something new and Made in Usa , but I feel better when Ive supported another job like my own.
Now no need to get a huge post regarding China jobs, Usa jobs etc This is just my opinon.
Good Luck with your project.