1.Application: The multifunctional water quality tester is suitable for hot springs, swimming pools, ponds, bathtubs, tanks, etc. 2.6in1 detection function: the digital water quality detector can detect PH, TDS, EC, ORP, CL and TEMP of water quality, giving you a comprehensive understanding of water quality. 3.IP67 waterproof: The water quality tester is made of PP material, which is of reliable quality, has good waterproofing and a long life. Please note that you need to tighten the gasket (included) before putting it in water to avoid water ingress. 4.Display: The water quality meter has a large display with backlight, so you can easily read the data in daylight or in the dark. The backlight can be turned on or off.