1. High waterproof performance: This swimming pool thermometer is made of highquality resin material, with an improved and optimized waterproof seal to ensure that the product does not have leakage or other problems that lead to defective products, and has a higher waterproof rating to prevent the LCD screen from being damaged during use. There is no fogging, thus having a longer life. The cover must be tightened during use to enhance the waterproof effect. 2. Accurate reading: The digital swimming pool thermometer has a clear LCD display and supports recording the highest and lowest temperature of the day. Indoor and outdoor temperature display: ℃/℉ optional. Pool sensor temperature detection range: 40℃70℃ (40℉158℉), indoor host temperature detection range: 9.9℃50℃ (14.2℉122℉). 3. Wireless ConnectionWireless distance: 433MHz/100M (330ft), oneway connection allows you to check the temperature readings with the receiver without leaving the room. The temperature error is within ±1°C and the transmission distance is 60m. 4. Easy to use: the swimming pool thermometer (cone) floats on the water and measures the water temperature 100 metres above the surface and 60 metres below the surface. The host computer is placed indoors and the measurement data is transmitted to the base station via radio, so that time, temperature and humidity data can be read on the base station or the transmitter itself.