DescriptionWith high sensitivity glass probe, PH meters full measurement range of 0-14pH, 0.01 pH resolution. And the pH meter uses a 3-point calibration method, calibrating the electrode to solutions of pH 4.00, pH 6.86, and pH 9.18 to ensure the accuracy of your measurements.Features- Color: Red.- Size: 18.50X3.70X3.70cm/7.27X1.45X1.45 inch.- Material: Plastic.- Providing accurate water quality, helps to make a healthy life for your family.- Lightweight and mini size, portable to carry. This meter makes the process quick and easy.- 4 in 1 function, can be used to test pH, total dissolved solids, EC and TEMP of water. Easy to calibrate, and stabilizes at the correct pH every time.- Easy to operate and read the digits, convenient to use. Multiple pH pens and test solutions can be done by this small unit.- Suitable for water sources, aquariums, hydroponics, swimming pools and other water systems.Specification- Range: pH: 0-14pH; EC: 1 to 19999us/cm; total dissolved solids: 1 to 19999ppm; TEMP: 0 to 60.0 / 32.0 to 140.0.- Resolution: pH: 0.01pH; EC: 1us/cm; total dissolved solids: 1ppm; TEMP: 0.1/0.1.- Accuracy: pH: 0.05pH/0.1pH; TEMP: 0.5; EC: 2%; total dissolved solids: 2%.- Temp compensation: Automatic temperature compensation (0-60)- Battery/Auto power-off: 3pcs 1.5V button cell.- Auto power-off: 5 minutes- Environment: 0 to 60.0 (32.0 to 140.0); RH 100%.Packing list: 1 x test pen