1) The mobile phone fully displays all measurement functions, and the data is clear at a glance. Supports mobile controls with and without backlight, showing battery level. 2) View data at any time, save data automatically or manually, automatically adjust the time interval for saving data, support data sharing, save data as excel, and change data At a glance. 3) The mobile phone can set the upper and lower limits of PH and TDS/EC. Set them according to your needs. When the value you set exceeds the test range, the interface will display a red value abnormally. 4) 5-point calibration, two sets of calibration modes can be selected, and calibration records can be viewed feature: scope: PH: 0.00~14.00pH TEMP: 0.1-60.0C; 32.0-140.0F TDS: 0~9999ppm EC: 0~100009uS/cm Chlorine: 0.1~4.0mg/L ORP :-1200~+1200mV Resolution: PH: 0.01pH TEMP: 0.1C; 0.1F TDS: 1ppm, 0.1ppt EC: 1uS/cm; Accuracy: PH: 0.05pH temperature : 0.5 TDS/EC: 2%FS