Professional Water Quality Tester, 7-in-1 PH, TDS, Temperature7 in 1 Tester: This smart monitor combines 7 essential functions to accurately measure PH, TDS, TEMP, EC, Salinity, SG, ORP. Comprehensive water quality measurement to ensure healthy water quality. Automatic Shutdown: The tester shuts off automatically after 5 minutes of non use to conserve batteries. Features a hold function that saves measurements for convenient reading and recording. Easy to Use: Just turn on the tester and place it in the water,