Features: The WiFi online pH EC controller allows you to real time monitor the pH and EC via your smartphone on the APP(for free), it is compatible with ios and Android system, perfect for 24 hours online monitoring. Widely used to test the pH / Temperature / EC(electric conductivity) of water. With relay output power socket, you can control the pH value according to your requirements. You can replace the fuse easily and fast with external replacement. Detachable and replaceable pH electrode. With power plug for air outlet stone, oxygen pumps, carbon dioxide regulators, solenoid valves and other pH control devices. Test the EC with both us/cm and ms/cm units at will. Easy calibration of pH/EC with just a mini-screwdriver and automatic temperature compensation. Clear LCD with backlight, 3 results displayed simultaneously. Easy to use and provide instant display of results. Test temperature in / (switchable units) and can online monitor and control pH for a long time. Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, environment water, swimming pools, water purification systems, etc. APP Language Selection: English, French, German, Russian, Japanese, Korean, Spanish, Chinese, Traditional Chinese (Only supports Chinese and English in offline state) Specifications: Plug Type: AU / EU / US / UK (Optional) Material: ABS Power Supply: AC230, 50Hz (EU) / AC120V, 60Hz (US) APP Name: OS Requirement: Compatible with iOS and Android system Range: pH: 0.00~14.00pH EC: 0~19000us/cm, 0~199.0ms/cm Temperature: 0~50 (-32~122) Resolution: pH: 0.01pH EC: 1us/cm(<1000us/cm) 10us/cm(>1000us/cm), 0.1ms/cm Temperature: 0.1(0.2) Accuracy: pH: 0.1pH EC: 2%F.S Temperature: 1.0 Alarm Setting Range: pH: 0.00~14.00pH EC: 0~20000us/cm Temperature Compensation: 0~50 (32~122) Operating Temperature: 0~50 (32~122) Length of Sensor Line: 2m / 6.56ft pH/EC/TEMP Tester Size: 160 * 95 * 40mm / 6.30 * 3.74 * 1.57in (Excluding Electrode Connector) Control Socket Size: 130 * 65 * 53mm / 5.12 * 2.56 * 2.09in (Including Fuse) Item Weight: 871g / 1.92 Package Weight: 1070g / 2.36lb Package Size: 32 * 20.5 * 7.6cm / 12.60 * 8.07 * 2.99in Packing List: 1 * 3 in 1 Water Quality Tester with EC Electrode 1 * pH Electrode 1 * Temperature Electrode 2 * Suction Cup 4 * Screw 4 * Anchor Bolt 1 * User Manual (English)