Features 1. Test your Water with This TDS Meter: Is your water pure and drinkable? With the push of a button, the TDS water quality tester will tell you your overall water purity level, which will be displayed on the screen in ppm. 2. Easy and Instantly: Just turn TDS meter on and stir water gently, then stabilized readings will be auto-locked on LCD in seconds, and the tds ppm meter will shut off automatically if without operation over 2 minutes. 3. Multipurpose TDS Tester: Test the purity of drinking water to ensure it's healthy, monitor if filter need replaced, maintenance aquarium, hydroponics(test nutrients), pool and spa, etc. 4. Multifunctional and Upgrade: Professional TDS, EC and Temperature Pen 3 in 1. Upgraded with big backlit LCD for easier reading, and auto-lock function for easier use. 5. Accurate and Reliable: To achieve high accuracy, equipped with premium quality titanium alloy probe, and reliable automatic temperature compensation, ensures reading always be accurate at various temperatures. Specification Material: Main body plastic, LCD screen, Metal probe Color: White Size: 15 x 2 x 1 cm Weight: 21 g Voltage: 1.5 V Battery Capacity: 160 mAh Current: 06 mA Measuring Range: TDS: 0 - 9999 ppm, Conductivity: 0 - 9999 s/cm, Degrees Celsius: 0- 80C, Fahrenheit: 0 - 176F Accuracy: 2% F.S Package Include: 1 TDS Tester