FNNEMG

Floating Smart Swimming Pool Water Quality Tester 6 in 1 PH/EC/TDS/ORP/Temp APP Digital Display Residual Chlorine Water Tester Pen for Swimming Pool Aquarium and Drinking Water Data Synchronization Display: Just immerse the electrode in the solution to be tested, the data will be synchronized to the mobile APP, multiple data display at the same time, convenient and fast. There is...