Xiaomi TDS Water Quality Tester Pen can accurately detect the water TDS value. Generally, lower TDS value indicates less soluble salts contained in the water, and more pure water quality. Easy to use: Put the Tester Pen in the water, and press the ON/OFF switch, the display will show the TDS value of water immediately. TDS water quality test results will directly affect people's drinking behavior.

• Adopts high-precision components to ensure the accuracy of long-term use

• Use it by just 1 click

• No complex chemical test needed

• Keep abreast of the household water purity

• 2 minutes Auto Shut Off feature, power saving

• Waterproof design and low power consumption

• Powered by 2 AG13 button cell batteries (not included)

• Ultra lightweight, only about 27.4g, easy to take along

• LCD display, easy to read