4 in 1 PH Tester: A very complete kit to check the quality of your water, from tap to recycling, including the aquarium or swimming pool. TDS/PH testers have small dimensions and low weight like a pen, pH meter for drinking water, beverages, for aquariums, hydroponics, swimming pools.

Ease of use of the pH meter: TDS water freezes the measurement result when you press the \"HOLD\" button and automatically turns off after a few minutes of inactivity. And these 2 in 1 pH meters and TDS meters are also ideal for home testing.

High accuracy: The pH meter's numbers range from 0.00 to 14.00 (PH), while the digital EC and TDS meters' numbers range from 0 to 19,990 ppm. Use a digital meter to get accurate numbers instead of comparing color with pH test paper, avoid making inaccuracies due to different light, also useful for people with weak color.

Easy calibration: The pH tester automatically calibrates at three points (6.86 and 4.01 point calibration). You don't need any tools, just immerse the pH meter's electrode in the solution. Press \"ON/OFF\" to open the electronic pH meter, shake lightly and wait a few seconds for the readings to stabilize.