1、Wireless Connection: The PH tester supports BT connection, multifunctional 4 in 1 can measure PH, EC, TEMP values 2、Full Screen Display: The PH tester can display in full screen, turn on BT, open the mobile APP, which is controlled by the mobile phone intelligently, without key operation 3、Mobile APP Synchronization: Just immerse the PH tester in the solution to be tested, and the data will be synchronized to the mobile APP and multiple data will be displayed at the same time 4、Convenient and Practical: The PH tester is convenient and practical, and does not require frequent operation to view data 5、Highly Sensitive Electrode: The PH tester adopts highly sensitive glass electrode, anti rust electrode, detachable Item Type: PH Tester Material: ABS Product Size: Approx. 187 x 37mm / 7.4 x 1.5in PH: 0.00-14.00, 0.01, ±0.05pH Total Dissolved Concentration: 0-999ppm 1000-9990ppm, 1ppm, ±2%F.S. EC: 0-9999μS/cm; 10.01-19.99mS/cm, 1μS/cm; 0.01mS/cm, ±2%F.S. TEMP: 0.1°C-60.0°C 32.1°F-140.0°F, 0.1°C/0.1°F, ±0.5°C 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 (0.1℃-60℃) BT: BT Version 5.2 Backlight: Mobile Phone Controls The Backlight Widely Used: in Drinking Water, Sewage Treatment, Water Purification, Fish Tanks, Breeding, Swimming Pools, Hydroponics, Medicine Treatment, Etc. Weight: Approx. 167g / 5.9oz 1 x PH Tester 1 x Cover 1 x User Manual