4 in 1 PH Tester: A very complete kit to check the quality of water, from taps to recycling, including aquariums or swimming pools. Small in size and lightweight, the TDS/PH tester can be used as a pen, pH meter, suitable for drinking water, beverages, aquariums, hydroponics, swimming pools. < p>Easy-to-use PH meter: When you press the HOLD button, the TDS water freezes the measurement and automatically shuts off after a few minutes of inactivity. These 2-in-1 pH and TDS meters are also ideal for home testing. High accuracy: pH meters range from 0.00 to 14.00 (PH ), while the digital EC and TDS meters range from 0 to 9990ppm. Use a digital display to get precise numbers instead of matching colors with pH bands, avoid inaccuracies due to different lighting, and also helps with low chromaticity. < p>Easy to calibrate: you don't need any tools, just dip the pH meter electrode in the solution. Press ON/OFF to turn on the electronic pH meter and shake gently for a few seconds until the reading stabilizes. The pH, TDS and EC meters laptops are versatile professional sets. It can be widely used in various water quality testing applications: production and consumption of pure water, tap water, well water, sea water, aquarium water, swimming pool water, early rupture of the amniotic fluid, etc. Packaging: 1 Acidity Meter Size: 19cm*11cm*4.5cm Power Voltage: 1.5V Measurement Accuracy: 0.01 Temperature compensation range: 0-50 Probe Type: Precision Glass Bulb Electrode Note: Due to the different images displayed, the actual color shall prevail. Dimensions are measured by hand, there may be errors (1-2 cm).