Features It has a green backlit LCD display to help you see the measurement results clearly, and you don’t have to worry about it when the light is low. With automatic temperature compensation function, the tester can accurately determine the pH value of the sample within the temperature range of 0°C‑50°C (32°F‑122°F), thereby solving the inaccuracy problem caused by the change of liquid temperature. Using a high sensitivity glass probe, the measuring range of the PH meter is 0‑14, the resolution is 0.01, and the test result is accurate. The PH meter uses a three point calibration method to calibrate the electrode to a solution with a pH of 4.00, a PH of 6.86 and a PH of 9.18 to ensure the accuracy of the measurement. The scope of application is extremely wide, and it is fully used in various industries, such as agriculture, animal husbandry, aquatic products, and chemical industries. Specification:Item Type: PH Meter Model: PH-2033H Material: ABS Battery: 4 x 1.5V LR44 (AG13) (Battery Not Included) Uses: agriculture, animal husbandry, aquatic product, food brewing, medicine, cosmetics, medical institution, paper and pulp, chemical industry, fiber dyeing, electrical chemistry, printing, water purification, etc. Range: PH: 0.00~14.00PH, Temperature: 0℃~50℃ (32℉~122℉) Accuracy: PH: 0.01PH, Temperature: 0.1℃ Resolution: PH: ±0.1PH, Temperature: ±1℃ Automatic Temperature Compensation: 0℃~50℃ Working Temperature: 0℃~50℃ Package List:1 x PH Meter (Battery Not Included)1 x Screwdriver1 x Manual  Package List 1 x PH Meter (Battery Not Included) 1 x Screwdriver 1 x Manual