Welcome to Fashion Trench.The Products is 100% brand new and high quality"Features:1. 100% Brand new and high quality2. This item can be used in: water purifiers and filters， food (vegetable， fruits) & drink quality monitoring， pools and spas， aquariums， hydroponics3. Hold function: Saves measurements for convenient reading and recording4. Auto-off function: Turns off meter after 10 minutes of non-use to conserve batteries5. Dual Range: Measures form 0-999ppm， with a resolution of 1ppm. From 1，000 to 9，990ppm， the resolution is 10ppm， indicated by drinking x 10image， Factory calibrated6. Range:0-9990ppm7. Accuracy: +/-2%8. Battery: 2 x 1.5V Button Cell battery (not included)Specifications:Item size:155mm x 28mm x 15mmColor: BeigePackage Included:1 x TDS Meter Tester1 x User Manual"Please allow 3-5 pieces error due to manual package