1、The WiFi online pH salinity controller allows real time monitoring the pH and salinity via your smartphone on the APP, it is compatible with for ios and for Android system, great 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 and salinity value according to your requirements. 4、With double power plug for air outlet stone, O3 generators, oxygen pumps, carbon dioxide regulators, solenoid valves and other control devices. 5、Clear LCD with backlight, 3 results displayed simultaneously. Easy to use and provide clear display of results. Specifications: Material: ABS APP Name: OS Requirement: Compatible with for iOS and for Android system Range: pH: 0.00~14.00pH Salinity: 0~199.9ppt Temperature: 0~50℃ (32~122℉) Resolution: pH: 0.01pH Salinity: 1ppm(<1000ppm), 10ppm(>1000ppm), 0.1ppt Temperature: 0.1℃(0.2℉) Accuracy: pH: ±0.1pH Salinity: ±2%F.S Temperature: ±1.0℃ Alarm Setting Range: pH: 0.00~14.00pH Salinity: 0~20000ppm Temperature Compensation: 0~50℃ (32~122℉) Operating Temperature: 0~50℃ (32~122℉) Length of Sensor Line: 2m / 6.56ft pH/ORP/TEMP Controller 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: 869g / 1.92lb 1 * Water Quality Tester with Salinity Electrode 1 * pH Electrode 1 * Temperature Probe 2 * Suction Cup 4 * Screw 4 * Anchor Bolt 1 * Manual (English)