Description: This is a digital TDS meter tester for testing the purity of filter water quality. To check the performance of your water filter, to check the hardness (1 grain = 17ppm), to ensure you always drink pure water. Stores measurements for convenient reading and recording of new arrivals. Features: [LCD Display] The water quality test has a large and easy-to-read LCD display. Highly efficient and accurate thanks to advanced microprocessor technology. [Easy to use] Supports automatic temperature compensation and the water quality test can switch between TDS and conductivity. [Energy-saving] Auto-off function: Turns off the meter after 5 minutes of non-use, to save the batteries. [Portable] Small but suitable for testing the pH balance of drinking water, swimming pool, fish tank, RO system, spa or hydroponics. [Widely used] Can be used in water purifiers and filters, to monitor the quality of food (vegetables , fruit) and beverages, used in pools and spas, in aquariums and in hydroponics. Specifications: Color: White Material: ABS Style: Casual EC: 0-9990 Ous/cm TDS: 0-9990 ppm Dearees Celsius: 0.1-80.0 Celsius Fahrenheit: 32.0-176.0 Accuracy: 2% Battery: 3V CR2032 button battery (included ) Application: Water Occasion: Home, Outdoor Package Size: 15.4*3*1.4cm/6.06*1.18*0.55in Package Weight : 69g / 0.15lb Package List: 1 * Water Quality Test 1 * Leather Case 1 * User Manual How to use: 1.Please unplug the plug before use Electrode sleeve. 2.Press the switch and place Place the electrode in the test solution. 3.After numerical stabilization, press the HOLD button and take it out of the solution to read. 4. After reading, turn off the meter and clean the electrode before wrapping it.