Specification:Condition: 100% Brand NewMaterial: ABSColor: WhiteRange: 0-9990ppmResolution: 1ppm(0-9990ppm), 10ppm(1000-9990ppm)Test Accuracy: ±2% Full ScaleWorking Temperature: 0°C-50°CBattery Type: 2. 1.5V Button Cell Batteries(not included)Size: approx. 14.3*2.4*1.4cm/5.63*0.94*0.55inWeight: approx. 50g/1.76ozHow to use:1. Remove the pen cap and turn on the ON switch. 2. The pen shall be put into the test solution, and the height of the solution shall not exceed 2 cm; 3. Dry the pen point after the application is finished. Precautions: Avoid soaking the TDS pen in the water, avoid direct light and high temperature, and avoid the impact of the weight and fall.Package List:1 * Water Quality Tester(Battery Not Included)Note:1. Please allow 1-3cm error due to manual measurement, thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos displayed in photos may be showing slightly different from the real object, please take the real one as standard.