SOLAR WATER THERMOMETER:An essential floating pool thermometer for measuring water temperature in swimming pool, hot tub, jacuzzi, pond, etc. MATERIAL OF POOL THERMOMETER:Pool spa floating thermometer is made of polypropylene and silicone rubber Floating pool thermometer made of sturdy and shatterproof ABS plastic, which lasts from season to season and is suitable for indoor and outdoor use. LMeasuring range: -20~70°C / -4~158°F TAccurate reading, ranges between -20~70°C and -4~158°F Large easy to read digital display with button functions: Reset(On) + °C/°F Always floats to water surface and attaches to pool walls with nylon rope(42in cord included) 3Ideal for indoor and outdoor pools, hot tubs, fish ponds, aquariums, jacuzzis, and ornamental ponds. OCCASIONS:Summer is coming,Now you can see from the couch, if the water from the swimming pool is nice hot. The floating thermometer is ideal for family swimming pools, spas, pool spa, hot tubs, aquariums and fish ponds. EXCEPTIONAL CUSTOMER