Usage Tips:[Wireless Pool Thermometer]The maximum wireless connection range of the floating pool thermometer is 328ft, and the temperature error range is within ±1°C. The outdoor pool thermometers can be wirelessly connected to indoor receivers, allowing you to use the receiver to check temperature data without leaving the room. Temperature measurement range of pool sensor: -40~70 °C/-40~158 °F. Indoor receiver temperature measurement range: -10~60 °C/14~140 °F. [Digital Pool Thermometer] The pool thermometer floating is equipped with a sensitive contact probe, which can quickly and accurately detect water temperature. The swimming pool thermometer has a clear LCD display screen, which can display 12/24 hours of time. You can choose the temperature unit you want through the "C/F" button. The wireless pool thermometer provides you with accurate readings in Fahrenheit and Celsius, supporting MAX and MIN temperature recording. [Helpful Accessory]The digital pool thermometer is packaged with a rope. The wireless pool thermometer float around with the water, so tying to the thermometer allow you to find the pool thermometer quickly and not lose it. [High-Level Waterproof]This pool temperature thermometer features an advanced IP67 with a double-sealed waterproof cover. Before placing the pool thermometer digital in the water, please tighten the thermometer cover, otherwise water may enter. If you find water mist on the screen of the floating pool thermometer lid, please unscrew the lid to dry and then use it. [Multiple Purposes] The wireless pool thermometer floating has a compact and exquisite appearance, rich functions, and is very suitable for use in swimming pools, hot tubs, aquariums, baby bathrooms, and spas. Color: White & Gray Material: ABS Package Contents: 1 x Mainframe (without 2X AAA battery) 1 xPool temperature outdoor sensor (without 2X AAA battery) 1 x outdoor unit pool lanyard 1 x