[4 in 1 Meter with Bluetooth] Powered by the mobile App, professional measurement of , TDS, humidity, and Temp. suitable for household drinking water, hydroponics, lab, aquarium.[Cloud Based Data Management System] Precision real-time Bluetooth data transmission, the measurement value is clear. allows you to save, manage, and share your test data at your fingertips, and never have to worry about data loss.[Automatic Calibration Tester] With high sensitive glass probe, you can get a full measurement range. Just insert the probe into the solution, You can calibrate effortlessly to ensure the accuracy of your measurements.[Automatic Temperature Compensation] Temperature can affect reading levels, the digital tester has an even better range of 0.0Celsius-60.0Celsius (32.0Fahrenheit-140.0Fahrenheit), automatic temperature compensation can ensure that you are getting the best reading, so you can test with confidence in any environment.[High Accuracy Water Tester] High-accuracy algorithm chip and electrode of our digital water quality tester ensure an accurate and fast response. Green Backlit LCD Design guarantees that you can read the measuring results in any condition. One-button lock reading function helps lock reading even if the tester is taken out of the sample. Range: 0-9990us/cm,10.01-20.00mS/cmResolution: 1us/cm, 0.01mS/cmAccuracy: 2% F.S.TDS Range: 0-9990ppmResolution: 1ppmAccuracy: 2% F.S.RH Range: 1-99% RHResolution: 1% RHTemperature Range: 0.0-60.0Celsius 32.0-140FahrenheitResolution: 0.1Celsius/FahrenheitAccuracy: 0.5CelsiusOperation Environment: 0.1-80Celsius; RH max 90%Battery: 3 * 1.5V(LR44),Not include ,Low battery warningDisplay: LCD digital displayBacklight: with backlights, support mobile control.Temperature: Automatic Temperature Compensation 0-60CelsiusBluetooth: Support Bluetooth 5.2 VersionPrinting: Support printingData Save: Save as excel sheetColour:blueMaterial:plasticSize:156 x 30mmPackage Contents:1 x 4 in 1 MeterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.