$8 with coupon for Original Xiaomi Mi Quality Water TDS Pen from EU CZ warehouse BANGGOOD

Original Xiaomi Mi TDS Pen
Pen which can test the quality of the water, it also determines whether purification is required. Mi TDS Pen reacts to organic compounds, and heavy metals like nickel, chromium etc. and soluble salt content. The pen is IPX6 waterproof and has automatic temperature calibration and precision in measurement.