Product Description Measurement Range: 0.00-14.00 Ph Accuracy Error: 0.01 Ph Resolution: 0.01 Ph Working Temperature: 0-80 Calibration Method: 2-Point Automatic Calibration Electrode : Glass Bulb Bare Machine Size And Weight: 155Mm*29Mm*16Mm, 48G Battery: 2*1.5V (Lr44 Button Cell) Quantity:1Pcs Package Content: 1 X Ph 1 Detection Pen .High Accuracy: Make Sure Your Swimming Pool, General Hydroponic Ph Or Even Drinking Water Has Perfect Ph Balance And Safe To Use With The Tester'S Ph Accuracy. The Tester Has A Sensitive Electrode Sensor To Read Accurate Ph Levels. The Detailed Manual Included Will Show You How To Get The Best Accurate And Stable Reading 2.Wide Usage: Ideal Compatible With Home Or Laboratory Use, Suitable Compatible With Testing The Ph Balance Of Drinking Water, Swimming Pool, Water Aquarium, Ro System, Spa Or Hydroponics; Suitable Compatible With A Wide Range Of Applications 3.Auto Calibration: The Ph Meter Has An Automatic Temperature Compensation Feature That Adjusts To Water Temperature And Quality To Give Readings Of Ph Almost Instantly. Moreover, You Can Calibrate The Tester With One Touch Button By Using Buffer Powder. 4.Automatic Temperature Compensation: No Need To Pay Attention To The Temperature Of The Test Liquid, Because The Ph Meter Has Built-In Automatic Temperature Compensation (Atc), So That It Can Accurately Determine The Value Of Sample Ph At Any Temperature Within The Range Of 0C -80 5.Make You Satisfied With The Products: Come With 1X Ph Meter, 1X User Manual, 2X 1.5 Button Batteries V Lr44 (Integrated), 3X Ph Buffer Powders