Wireless Floating Thermometer for Pool Spa Garden Pond with High Accuracy

You can easily switch between Celsius and Fahrenheit modes at the push of a button. Size:Host size: 10x7.2x2.9cm,Sensor size: 18.7x9.4x8.7cm. 1 host, 1 water temperature sensor, 1 sensor lanyard, 1 instruction manual.

eBay