The TDS-EC Water Test Pen is a must-have tool for anyone who wants to ensure their water quality is safe and reliable.

With its advanced microprocessor technology, this pen can measure TDS (Total Dissolved Solids), EC (Electrical Conductivity), and temperature all in one convenient device.

The backlit LCD display makes it easy to read the results, even in low-light conditions, and the auto-lock function ensures that the reading is stabilized and locked automatically for easy reading and recording. The TDS-EC Water Test Pen is perfect for a wide range of applications, including water purification, aquaculture, hydroponics, pool and colloidal silver testing, and more.

It's also great for checking the quality of tap water, filtered water, distilled water, bottled water, well water, and refrigerated water. Don't risk your health or safety by drinking untested water - get the TDS-EC Water Test Pen today and take control of your water quality!