Multifunctional Water Quality Meter Tail Light Energy Saving One Key Switch Digital PH Tester for Swimming PoolDescription:Data retention function allows you to record data more conveniently. Its wide range of applications allows it to be used to test all types of water. Automatic temperature compensation ensures that readings are always accurate at different temperatures. The auto-off feature saves battery power. Made of ABS material, it is very durable to use. The length of these two testers is 18.3cm, width is 3.7cm, and height is 3.7cm. It is ideal for testing water, swimming pools, aquariums, spas, hydroponics, food, wine and beer, etc. Item Name: Water Quality TesterMaterial: ABS Test Range:TDS: 1-9990ppmPH: 0.00-14.00PHWe: 1-19990us-cmAuto Power Off: 5 minutesBattery: 3x1.5V Battery (Included)Resolution: PH: 0.01ph EC: 1us/cm TDS: 1ppmTemperature Compensation: 0-60 Degrees CelsiusPH: 6.68/4.00/9.18 Calibration Accuracy Within ± 0.05phFeatures: LCD Display, Power Saving, Auto Power Off FunctionTemperature: 0-60 Degrees Celsius-32.0-140.0 Degrees Fahrenheit Accuracy: PH: ± 0.05ph EC: ± 2% TDS: ± 2% Temperature: ± 0.5 centigrade Calibration: EC/TDS/Temperature factory calibration can be used directly Working Environment: 0-60 degrees Celsius (32-140 degrees Fahrenheit) Humidity: 100%Size details:Size: 18.3cm x 3.7cm x 3.7cm/7.2" x 1.46" x 1.46" (in pr