Feature 1、High Accuracy: For high accuracy, a titanium probe and reliable Automatic Temperature Compensation (ATC) ensure consistently accurate readings over a wide range of temperatures. 2、Auto Off Function: Keep the auto off function, freeze the measurement for viewing in water. Turn off the meter after 5 minutes of non use to save battery. 3、ABS Material: Portable water tester uses strong ABS material, which is wear resistant and durable, and can be used for a long time. 4、Simple Operation: Just turn on the PH meter and stir the water gently, then a stable reading will be displayed on the LCD within a few seconds, if there is no operation for more than 5 minutes, the tds ppm meter will automatically turn off. 5、Applicability: The meter is the ideal test kit for home and laboratory use. Ideal for testing water, swimming pools, aquariums, spas, hydroponics, food, wine and beer making and more. Item Type: Water Quality Test Pen Material: ABS Weight: Approx. 163g / 5.7oz Measuring Range: pH: 0.00-14.00 pH; EC: 0-19990μS/cm Resolution: 0.01 pH; 1 μS/cm; 0.1°C; 0.1°F Accuracy: pH: +/-0.01 pH; EC: +/-2%; Temperature: 0.5℃ Battery: 3x1.5V LR44 Button Battery (Not Included) Temperature: 0.1 to 60.0°C; 32.0 to 140.0°F Calibration: PH: Three Point Automatic Calibration (6.8, 4.00, 9.18 pH); EC: 1413 μS/cm Automatic Shutdown: 5 Minutes Uses: Ideal for Testing Water, Swimming Pools, Aquariums, Spas, Hydroponics, Food, Wine and Beer Making, Etc. Package List 1 x Water Quality Test Pen 1 x User Manual 3 x Detection Powder Pack