🏄【Upgraded IPX7 Waterproof Protection】The swimming pool thermometer is made of quality materials, and upgraded and optimized waterproof sealing to ensure the product will not leak and cause defective products. (NOTE: The host is equipped with a built-in waterproof ring. When using it, it is necessary to tighten the cover tightly) 📐【Floating Easy Read Pool Thermometer】The temperature detection range of the indoor host is 0°C~+50°C (132°F~122°F), and the temperature detection range of the pool sensor is -40°C~+70°C (-40°F~158°F). Indoor and outdoor temperature display ℃/℉ optional,Compatible with 2x1.5V “AAA” alkaline batteries(not included) 📐【Wireless connection】 Effective distance 50m, no wall and obstruction distance 80-120m, this outdoor thermometer connects seamlessly to the indoor monitor, allowing you to check pool or spa temperatures from the comfort of your home 📐【Easy to Set up and Used】 Once the Floating Water Thermometer of the batteries(not included) are installed the unit immediately starts reporting temperature in the pool. The Farenheit units setting came up as default, and all you had to do is set the time Monitor has large numbers for easy reading from a distance. You can so easily check the pool's temperature with this. 🏄【Measuring Water Temperature in Multiple Environments 】Wireless pool temperature thermometer with display screen can detect the water temperature in swimming pools, bathtubs, fish tanks, saunas, breeding ponds, and other places. In addition, it monitors the indoor temperature and humidity, and also has a clock function, which is multi-functional and easy to set.