I'm an international seller, your order will be shipped from China, we shipped all parcels by Yun Express, it will delivered in 8-14 days. please allow the necessary time about minimum 14 working days for delivery right now depending on your shipping country, due to ongoing delays in postal deliveries globally.Feature: 100% Brand new and high quality. This digital pen style meter is an ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food & beverage, etc. And, this Digital TDS Water Quality Tester is ideal for all basic water testing applications. This product is highly efficient and accurate due to its advanced microprocessor technology. The value of TDS can show the content of impurities. The bigger of the value means that the content of impurities is larger; conversely, the content of impurities is small. The factors that affect the test value of TDS: the temperature of water (the TDS-3 tester cannot test the water with high temperature such as, boiled water). The flow velocity of water (the TDS-3 tester cannot be applied to test the flowing water) Hold function: Saves measurements for convenient reading and recordingAuto-off function: Turns off meter after 10 minutes of non-use to conserve batteries. Product properties:Type of Display: DigitalWith Backlight Or Not: NoDIY Supplies: ElectricModel Number: noneAccuracy: +/- 2%Battery: 2 x 1.5V Button Cell batteryItem size: 156mm x 30mm x 20mm (6.1 x1.2 x0.9in)Range: 0-9990ppm Item No: Q0940 Please Notice: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid The colors may have different as the difference display, Please understand. Package Included 1PCS x TDS Meter Tester