3-in-1 Digital TDS EC Meter Water Quality Tester with Temperature for Drinking
Press the shift key to switch between different modes. 1 X 3-in-1 Water Quality Tester. Size: 15.5cm X 3cm X 1.5cm. Conductivity: 0-999us/cm. ③ After the value stabilizes, press the HOLD key and take out the reading.