1. 3in1 water quality tester: With this water quality tester, you can get fast and accurate results for TDS, EC and water temperature. Easy to use, just remove the cover, dip the electrode into the water and you will get all the data. 2. Material: Water quality test pen is made of highquality ABS and aluminium alloy materials, antiabrasion and antidrop, high sensitivity to maintain accurate data, environmental protection, shock resistance, long life. 3. Easy to read: The TDS EC tester has a large display with backlight, so that it is easy to read even from special angles and in low light conditions. A temperature measurement is given, as well as a hold function. The handling is really very simple and intuitive. 4. Easy to carry: water quality tester is small and lightweight; it can be carried easily, and you can take it with you wherever you want, perform water quality tests at any time to ensure the of your water quality.