Photo 1 of YINMIK pH Pool Monitor, Smart pH and Chlorine Tester for Swimming Pool, Salt Water Pool 7 in 1 pH Chlorine Salinity ORP EC TDS Temp Monitor for Inground Pool, Above Ground Pool, Spa, Hot Tub

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Photo 1 of YINMIK pH Pool Monitor, Smart pH and Chlorine Tester for Swimming Pool, Salt Water Pool 7 in 1 pH Chlorine Salinity ORP EC TDS Temp Monitor for Inground Pool, Above Ground Pool, Spa, Hot TubPhoto 2 of YINMIK pH Pool Monitor, Smart pH and Chlorine Tester for Swimming Pool, Salt Water Pool 7 in 1 pH Chlorine Salinity ORP EC TDS Temp Monitor for Inground Pool, Above Ground Pool, Spa, Hot Tub