Features: brand new and high quality Use the data retention function to test the pH and temperature of the solution/water. Pocket size, light and portable, backlight switchable, large LCD screen, clear reading. Replaceable pH sensor probe-the electrode probe can be replaced with a plug-in design, which is convenient and quick to replace. ATC function (automatic temperature compensation), automatic calibration and IP65 full waterproof design. It is suitable for water sources, soilless culture, aquariums, hydroponics, laboratories, hot springs, swimming pools and other water systems. Specifications: Material:ABS Size:Approx.17.9x4.3cm/7.05x1.69inches PH measurement range: 0.00-14.00pH PH basic measurement error: 0.05pH Instrument repeatability: 0.03 Solvent temperature compensation range: 0-70 Repeatability: 0.01 Measured solvent temperature: 0-60 Power supply: 1.5V AAA batteryx2pcs (not included) Showcase: Large LCD segment display Operating temperature range: 0-50 Working humidity range: 80%RH This device is an intelligent precision measuring instrument, designed and manufactured with precision components and sensors, with high sensitivity and accuracy, adaptable to different temperatures, small in size, easy to store and portable. It can measure the pH value and the temperature of the solvent under test. PH meter is widely used in industry, electric power and agriculture, medicine, food industry, etc. It is very important to read this instruction before using this equipment to obtain correct readings. Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Water Quality Tester 1x User Guide