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 Only the above package content, other products are not included. Warm Tips 1. Due to different measurement methods, the goods will have a deviation of 1-3 cm, please confirm the accuracy before placing the order. 2. Due to different monitors and light, the picture may not reflect the actual color of the goods, please understand. 3. If you have any dissatisfaction with the goods, please contact us by email, we will give you a perfect solution at the first time.