Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! 5 in 1 (PH / EC / TDS / / TEMP) Measure Range: PH: 0.00-14.00pH EC: 0-19900us/cm TDS: 0-19900ppm : 0-1990.0CF Temp:0℃-50℃(32°F-122°F) Accuracy: EC,TDS: ± 2% F.S PH: ±0.05pH Temp: ±1.0°C Battery: 1 x 6F22 9V battery (Not include) Colour:Green Material:plastic Package Contents: 1 x Digital pH Meter 1 x User Manual (English) Only the above package content, other products are not included. Note: Light reflection 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. [Comprehensive Information Display]Simply immerse the pH meter electrode in the solution to be tested, readings are quickly displayed on a large LCD display. [TDS Meter with Automatic Temperature Compensation]Temperature can affect reading levels, digital pH tester has an even better range of 0.0°C-50.0°C (32.0°F-122.0°F), automatic temperature compensation can that you are the best reading, so you can test with confidence in any environment. [pH Meter with BT]Professional measurement pH, EC, TDS, and Temp. Suitable for household drinking water, hydroponics, lab, aquarium. It can be used as a classic tester even if it is not connected to a smartphone. [Cloud-Based Data Management System]Accurate real-time BT data transmission and clear measured values easy to save, manage and share test data without worrying about data loss. [Easy to Use]Digital pH fully customizable parameter settings, the APP can set the upper and lower limits of EC, which can be set according to your needs.