1、Multiple Function: Three in one PH EC Temperature measurement with Bluetooth function. High sensitive glass electrode, rustproof electrode, removable. 2、Data Synchronism: Simply immerse the electrode in the solution to be tested, and the data will be synchronized to the mobile APP and multiple data will be displayed simultaneously. 3、Display Results: Maximum or minimum value of PH/EC Can be set according to user requirements. If the test result is outside the range, the value will be displayed in red. 4、Wide Application: The digital water quality tester is widely used in drinking water, sewage treatment, water purification, fish tank, aquaculture, swimming pool, hydroponic, medical treatment and so on 5、Easy to Operate: ON/OFF short press to power on, long press to turn on wireless function. MODE/CAL short press to switch function, long press CAL calibration. HOLD/TEMP short press lock, long press switch ℃/F. Item Type: Digital Water Quality Tester Material: ABS Weight: Approx. 165g/5.8oz Size: Approx. 187x37mm / 7.4x1.5in Range/Resolution/Accuracy PH: 0.00-14.00pH, 0.01pH, ±0.05pH EC: 0-9999μS/cm; 10.01-19.99mS/cm , 1μS/cm; 0.01mS/cm, ±2%F.S. TEMP: 0°C-60.0℃ 32.0°F-140.0°F, 0.1°C/0.1°F, ±0.5℃ Calibration PH: 4.00--6.86--9.18/4.00--7.00--10.01 EC: 1413μs/cm; 12.88ms/cm Battery: 3 x 1.5V LR44 (Shipped Without Battery) Temperature Compensation Range: Automatic (0℃-60℃) Bluetooth: Bluetooth Version 5.2 Backlight: The Phone Controls The Backlight Widely Used In Drinking Water, Sewage Treatment, Water Purification, Fish Tank, Aquaculture, Swimming Pool, Hydroponic, Medical Treatment and So On 1 x Digital Water Quality Tester 1 x Cover 1 x Instruction