ANYQOO 7 in 1 Water Quality Tester Pen Meter for Pools, Drinking Water Aquariums hydroponic Cooking Tester Measure Water by PH/TDS/EC/ORP/S.G/Water Salinity/Temp 13 inch Macbook (2018-2020) Widely compatible with MacBook 12-inch

Widely compatible with MacBook 12-inch (A1706

If a defective battery has been inserted

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ANYQOO 7 in 1 Water Quality Tester Pen Meter for Pools, Drinking Water Aquariums hydroponic Cooking Tester Measure Water by PH/TDS/EC/ORP/S.G/Water Salinity/Temp 13 inch Macbook (2018-2020) Widely compatible with MacBook 12-inch[7 in 1 water quality meter] It can measure PH TDS EC ORP S. G Salty Temperature. The measurement range is large and wide. Pocket sized and multi functional, Ideal for household and laboratory pH testing applications, including drinking water, swimming pool, pond, beer brewing, kombucha, aquariums, hydroponics, laboratory, food processing, etc [Twice salinity meters] This product can detect the salinity of freshwater. At the same time, it can detect