PH Tester Wireless Connection Version 7 in 1 EC/ORP/SG Testing Backlight Simultaneous Data Display Water Tester Item Type: PH Tester Material: ABS PH Range: 0.00-14.00 pH Resolution: 0.01 pH Accuracy: ±0.05 pH EC Range: 0-9990uS/cm;, 10.01-19.99 mS/cm, 20.1-200.0 mS/cm Resolution: 1us/cm, 0.01mS/cm; 0.1ms/cm Accuracy: ±2% F.S Total Dissolved Concentration Range: 0-999ppm; 1000-9990ppn; 10.1-100.0 ppt Resolution: 1 ppm; 10ppm; 0.1ppt Accuracy: ±2% F.S Salt Range: 0.01-25.00 %; 0-999 ppm; 1000-9990 ppm; 10.1-100.0 ppt Resolution: 0.01 %; 1ppm, 10ppm; 0.1ppt Accuracy: ±2% F.S S.G Range: 1.000-1.222 ORP Range: -1200mV to +1200mV Resolution: 1 mV Accuracy: ±4 mV Temp Range: 0.1°C-60.0°C: 32.1°F-140,0°F Resolution: 0.1°C:0.1°F Accuracy: ±0.5℃ Calibration PH: 6.86/4.00/9.18 or 7.00/4.00/10.01 EC/Total Dissolved Concentration/Salt: 1413uS/cm; 12.88 mS/cm; 111.8 mS/cm ORP: 256mV Battery: 3 x LR44 Button Battery (Battery Not Included) Product Size: Approx. 187 x 37 x 37mm / 7.4 x 1.5 x 1.5in Mobile Phone Control: Support Backlight: Support BT Version: Mobile Phone BT5.2 Version Application: Widely Used in Drinking Water, Sewage Treatment, Water Purification, Fish Tank, Aquaculture, Swimming Pool, Hydroponics, Medicine Treatment, Etc. Weight: Approx. 160g / 5.6oz