Review on 💧 Digital Water Quality Tester with Calibration Kit - LiZi pH Meter by Celina Kowalczyk ᠌

The device may be good, but after reading the instructions 10 times, I did not understand anything - there are a lot of terms. The entire instruction is a list of excuses why the device will not work correctly. If I understand correctly, then it will always work incorrectly, tk. it is simply impossible to meet all the requirements. Separately, I would like to note that questions arise directly from the packaging. Written - digital PH meter in a case with calibration. Either the device has already been calibrated, or it means that there are means for calibration inside