Description: Measurement range: 0-9990ppm Error: 2%-3% Voltage: 3V(4 button batteries) Size: 25*14*134mm Weight: 40g Specifications: 1. Low power consumption smart chip: higher accuracy, more accurate detection and more stable quality 2. Carry the mini figure with you: check the purity of water quality anytime, anywhere, anytime 3. Titanium alloy probe: more accurate test, higher sensitivity, stronger sensitivity, more accurate test 4.3 seconds quick measurement: fast and accurate, easy to operate and test on the boot Automatic shutdown in 5.5 minutes: when the instrument is automatically shut down in 5 minutes without any operation, the service life of the battery is prolonged 6. Key lock intelligent memory: press HOLD to lock the value after the value is stable Package Included: 1 * Water Quality Inspection Pen