Features: Electric Temperature & Conductivity Meter features the most advanced and updated technology. Five different measurement needs can be fulfilled by one digital water quality tester. Not only been convenient for you, but also saves your for time and money, absolutely a helpful kit for your life. Just stick it in about 1 inch of water instantly you get the reading. It's compact and doesn'for t need any maintenance. The TDS water tester is a rugged model. This Meter Three Points Calibration Automatic buffer identification. Economy model that is for ideal for end-users. Highly efficient and accurate due to its advanced microprocessor technology. Water quality test meter is manufactured under for extra high standards and of excellent quality. Thus we have absolute confidence of our water test meter. Specifications: Material:ABS Color: White+Blue Size: 183*37*37mm(7.2*1.5*1.5in)/90g(3.2oz) Accuracy：0.01-5.00%（±0.1%）5.01-25.00%（±1%） TDS Range：0-1000ppm EC Range：0-10000US / for cm PH Range：0.01-14.00pH Salt Range：0.00-25.00％ Sea Water：10.1-200.0ppt 1. Pull out the electrode for protection cover before use. 2. Press the switch to turn on the power, then place the electrode in the tester. 3. When the value is stable, press the button to fix the measured value, then take out the meter and read the measured value. 4. After use, press the power off button to clean the meter and insert the electrode into the electrode protective cover. Package Includes: 1 Piece Water Quality Tester . 3 Pieces Button Battery. note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.