A professional device, heavy, accurate, complete with liquid calibration solutions, which cost a lot separately, well packaged, did not work out of the box until I removed the protective gasket from the discharge that stood between the batteries, a cap with a buffer solution was put on the electrode ! !bought in installments for 6 thousand when in other places the price tag was 9. Absolutely satisfied with the purchase.
I've added some pictures to my review to help bring my words to life.
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