Feature: 1. High‑accuracy probe and titanium alloy probes can avoid interference, reduce the magnetic field in the water, and reduce errors. 2. This instrument has 4 different modes, press SHIFT key to switch between different modes. 3. Power saving, without any operation for 5 minutes , the instrument will automatically shut down. 4. Three kinds of impurities in the water can be detected. The lower the TDS value, the less soluble salts such as heavy metal ions in the water, and the purer the water quality. 5. Automatic temperature compensation function in measurement mode, compact size, portable, light weight and easy to carry around. Specification: Item Type: TDS/EC Tester Material: ABS Color: As shown in the picture Weight: Approx.68g/2.4oz Measuring Range: EC: 0-9990us/cm TDS:0-9999ppm ℃: 0.1-80.0℃ ℉: 32.0-176.0℉ Accuracy: ±2% Battery: CR2032 button battery 230mAh (included) How to Use 1. Before use, please unplug the electrode protective cover. 2. Press the power button, put the electrode into the solution to be tested. 3. After the value is stable, press the HOLD key to take out the reading. 4. After the reading is completed, press the power button, wipe the electrode clean, and put the electrode protective cover in. . Package List: 1 x TDS/EC Tester1 x Instruction Manual1 x Pack Cover Note: Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.