Description 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 plug for air outlet stone, generators, oxygen pumps, carbon dioxide regulators, solenoid valves and other . 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 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 , etc. 10. APP Language : English, French, , Russian, Japanese, Korean, Spanish, , (Only supports and English in offline state) APP Name: Tuya OS Requirement: Compatible with iOS and Android system Range: pH: 0.00~14.00pH Salinity: 0~199.9ppt Temperature: 0~50 (32~122) Resolution: pH: 0.01pH Plug Type: US Plug, it applies to Canada, , Mexico, Thailand, Taiwan, the , the Philippines and so on. Item Weight: 869g / 1.92lb Colour:White Material: ABS Package Contents: 1 x Water Quality Monitor with Salinity Electrode 1 x pH Electrode 1 x Temperature Probe 2 x Suction Cup 1 x Manual (English) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.