1. The WiFi online pH salinity controller allows you to real time monitor the pH and salinity via your smartphone on the Tuya APP(for free), it is compatible with ios and Android system, perfect for 24 hours online monitoring.2. Widely used to test the pH / Temperature / salinity of water.3. With relay output power socket, you can control the pH & salinity value according to your requirements.4. You can replace the fuse easily and fast with external replacement. Detachable and replaceable pH electrode.5. With dual power plug for air outlet stone, ozone generators, oxygen pumps, carbon dioxide regulators, solenoid valves and other control devices.6. Easy calibration of pH/salinity with just a mini-screwdriver and automatic temperature compensation.7. Clear LCD with backlight, 3 results displayed simultaneously. Easy to use and provide instant display of results.8. Test temperature in / (switchable units) and can online monitor and control ORP & salinity for a long time.9. Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, environment water, swimming pools, water purification systems, etc.10. APP Language Selection: English, French, German, Russian, Japanese, Korean, Spanish, Chinese, Traditional Chinese (Only supports Chinese and English in offline state)APP Name: TuyaOS Requirement: Compatible with iOS and Android systemRange: pH: 0.00~14.00pHSalinity: 0~199.9pptTemperature: 0~50 (32~122)Resolution: pH: 0.01pHPlug Type :EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.Item Weight: 869g / 1.92lbColour:WhiteMaterial: ABSPackage Contents:1 x Water Quality Monitor with Salinity Electrode1 x pH Electrode1 x Temperature Probe2 x Suction Cup1 x 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.