Advanced processor: Automatically calibrated temperature; TDS tester measurement range of 0 - 9990ppm with 1ppm accuracy (Please receive the coupon code on the product page when purchasing to get a better price.) Hold Button: Holds measurement value when meter is removed from water for convenient reading and recording Temperature button: tests water in degrees Celsius and Fahrenheit; 31 - 200F degree range, 1F accuracy Auto-off function: automatically turns off after 10 minutes of inactivity to preserve battery life Practical: Comes with a leather carrying case and a clip, ideal for on the go About Shipping: All items will be shipped 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 2364 hours, wish you a happy shopping Thanks for your cooperation and well make you feel satisfied.