PYNQ Test function: Conductivity / Total Dissolved Substances TDS / Temperature Test accuracy: +/-2% Test range: Conductivity 0-9990um/cm TDS: 0-9990ppm Temperature: Accurate 0.1-80Celsius, 32.0-176.0Fahrenheit Color: White Material: Plastic + Metal Size: 150 x 20mm Package Contents: 1 x Water Quality Tester Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. the real thing. The allowable measurement error is +/- 1-3 cm. IMPROVED ACCURACY AND DURABLE - With the alloy probe and the latest sensors, you can get almost exact readings every time. In addition, the digital TDS water tester can be easily recalibrated for increased accuracy whenever needed. SUITABLE FOR ANY TYPE OF TDS OR TEST - Check the total dissolved solids or electrical conductivity of your aquarium, pool, or any water source. You can determine the efficiency of your RO, DI, or