Made of PP, electronic element, this swimming pool thermometer is strong and . Set the range, once the water exceeds the set range, the thermometer will automatically sound an alarm to remind you to adjust the water in time. Features -Color:White -Material:PP, electronic element -Size:4.20X4.20X2.60cm/1.65X1.65X1.02in -Power supply: (built-in) -Measure range: -20 degree centigrade-70 degree centigrade -Waterproofing grade: IPX6 -Perfect for measuring fishponds, swimming pools, , spas, hot tubs, aquariums and more. -Smooth surface design, will not hurt your hand, and comes with a string, you can use it for measurement without getting yourself wet. -Suitable for pools, bathtubs and other scenarios, to help you monitor the water and ensure a comfortable experience. -Safe and sturdy, you can use it with confidence, a great present for your friend and family. -Strong PP, electronic element material, to use, clear scale, better reading, this pool thermometer is very practical. Package list: 1 x thermometer 1 x specification