Smart Water Quality Tester: You can view the current data, historical data, and abnormally high and low data alarms on the phone APP APP Real-time Monitoring: It records the data for a long time, convenient for you to compare and analyze and formulate solutions Easy Operation: Immersed the electrode of the tester in water and waited for a few seconds to get the data on the LCD screen Fuse Protection: When the current is abnormal, it reaches a certain height, and it will cut off the whole circuit Application: Suitable for swimming pools, spas, fish ponds, aquarium, seawater, marine/saltwater fish tank, and so on Specifications: Material: ABS Controller Size: 160 x 95 x 40mm/6.30 x 3.74 x 1.57 in (Excluding Electrode Connector) Control Socket Size: 130 x 65 x 53mm/5.12 x 2.56 x 2.09 in (Including Fuse) Length of Sensor Line Length: 2m / 6.56ft Measuring Range: PH: 0.00-14.00PH ORP: -2000-+2000mV Temp: 0-50C (32F-122F) Alarm Setting Range: PH: 0.00-14.00PH ORP: -2000 - 2000mV Resolution: PH: 0.01PH; ORP: 1mV; Temperature: 0.1 (0.2) Accuracy: PH: 0.1PH; ORP: 5mV; Temperature: 1.0 Power Supply: AC230, 50Hz (EU) APP Name: Tuya OS Requirement: Compatible with iOS and Android system Operating Temperature: 0~50 (32~122) Package included: 1 x Water Quality Controller 1 x PH Electrode 1 x ORP Electrode 1 x Temperature Electrode 2 x Suction Cups 4 x Screws 4 x Bolts 1 x English User Manual