Features : Economy model that is great for end-users: Highly efficient and accurate due to its advanced microprocessor technology. Hold function: Saves measurements for convenient reading and recording and battery life is approx. Display: Large and easy-to-read LCD screen. Measurement range: 0-9999 ppm. From 0-9999 ppm, the resolution is in increments of 1ppm. Can detect three types of impurities in water: soluble salt impurities-calciums ions, magnesiums ions, etc.; ionic organics-sodium acetate, sodium sulfate, etc.; heavy metal ions-chromium, zinc, lead, copper, etc. (Note: The lower the TDS measurement value, the purer the water quality) Specification: Size: 150*16*16mm Measurement accuracy: 0-9999PPM Temperature range: 0-80 degrees Celsius Weight: 28g includes: 1 x TDS Water Quality Tester(built-in button battery) About shlpping: All items will be shlpped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.