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COM-600 7 in 1 PH TDS EC ORP Salinity S. G Temp Meter Water Quality Monitor Tester IP67 for Drinking Water, Aquariums PH Meter Color:Without Backlight Revolutionize your computer with KingSpec'sThis COM 600 7 in 1 PH TDS EC ORP Salinity S. G Temp Meter Water Quality Monitor Tester is a must have for any drinking water or aquarium enthusiast. Featuring a digital display with backlight and meeting CE standards, it offers professional accuracy in one compact device. Get yours today!