Wireless Floating Pool Thermometer Portable Digital Display Pool Spa Wi Fi Inkbird
 
Wireless Connection:
The maximum connection distance is 300 feet.
You can check temperature readings with the receiver without going outside the room.
Accurate Reading: Support both Fahrenheit and Celsius readings.
 
Premium quality: The thermometer has adopted high quality materials, it is solid and durable.
The IPX7 waterproof thermometer is ideal for Indoor & Outdoor.  Use in swimming pools, spas, fish ponds, aquariums, bath
Temperature ranges from -40?~70?(-40?~158?).