3-In-1 TDS Water Tester can be used to test TDS, EC and Water Temperature Accurately. TDS: 0-9999 ppm; Conductivity: 0-9999 s/cm; Temperature: 0.1-80.0C/ 32.0-176.0F; Accuracy: 2% Pen-type Design, compact and lightweight, convenient to use and store in your pocket or bag, you can take it anywhere. Can lock the readings for convenient reading and recording. Automatically turns off the meter to conserve batteries if without operation over 10 mins. Ideal TDS meter for testing water quality or purity in Water Purifiers, Water Filters, Drinking Water, Drinks, Pools, Spas, Aquarium, Hydroponics, Etc. Specification: color: white size: 1543014mm) Conductivity: 0-9999 us/cm TDS : 0-9999 ppm Celsius : 0.1-80.0 Fahrenheit : 32.0-176.0 Accuracy: 2% Battery: 3V CR2032 Button Battery (Included) Warm Tips: - Please don't store the TDS under high temperature and direct sunlight. - Please don't drop the entire TDS meter in the water or dip beyond the maximum immersion level. - Keep the electrode clean, cover the protective cap, please take out the batteries if idle for long periods. - Please adopt standard buffer solution calibration, incorrect calibration would cause measurement error, thus affect the accuracy of the test solution, or cause the instrument not to work properly. Package Included: 1 x Water Quality Tester(built-in 1 piece battery)