Features: High Sensitivity Detection: Alloy probe with high sensitivity. Glass electrode, with high accuracy in measuring water quality. 4-in-1Water Quality Tester: Water TDS,EC, pH andtemperature tester.Suitable for water quality testing in household use, aquaculture, swimming pools, etc. Clear Display: Large digital dial with clear numbers,high definition backlight display screen, convenient for reading. Reliable Performance: Lab quality probe with 0.01 pH resolution, auto temperature compensation (ATC) ensures reliable performance. After-Sales Service: If you have any problem, please contact us immediately, we will help you solve it as soon as possible. Specifications: Material: Plastic TDS Test Range: 1-9999ppm ECTest Range: 1-9999s/cm pHTest Range: 0.00-14.00pH Working Temperature: 0 - 60 Battery: 2 * 1.5V Button Battery Size: 150*29.5*14.5mm Weight: 55g Notes: Please note that due to the influence of light and screen, slight chromatic aberration is acceptable. Please allow slight measurement error due to manual measurement. 1 * Water Quality Tester 2 *Button Battery