1Support backlight display, visual display of measured values, and can be viewed normally in dark environments. 2The measurement range of this product is 0.0014.00PH, the accuracy is 0.1PH, and the resolution is 0.01PH. 3Portable PH meter, made of high quality ABS material, durable to use, wear resistant and corrosion resistant. 4Support temperature compensation 050, high measurement accuracy, easy operation and long service life. 5It is widely used in swimming pools, aquaculture, drinking water, irrigation, laboratories and other occasion. Item Type: PH Meter Material: ABS Weight: Approx. 372g / 13.1oz Range: 0.00-14.00PH Resolution: 0.01PH Accuracy: 0.1PH Temperature Compensation: 0-50 Battery: Built In 1 Set of Ni-MH Battery 4.8V 110mAH (Built In Battery) Adapter: US Standard 110V DC6V Charging Time: 4 Hours Working Temperature: 0-50 Relative Humidity (RH):