Super Waterproof: With its IP68 waterproof rating, the bath thermometer is perfect for use in swimming pools, hot tubs, pools, bathtubs, ponds, and more. Smart Remote Control: The digital pool thermometer is equipped with an RF 433 radio transmitter that has an effective range of up to 50 meters and in an open environment up to 80-120 meters. Accurate Temperature Measurement: The thermometer The water thermometer can accurately measure both indoors (0-50°C) and outdoors (-40-70°C). Smart Display: The bathtub thermometer is equipped with an electronic screen that displays real-time time and temperature and indicates low battery, making it more convenient for you to use. Easy to use: The sensor requires 2 AA LR6 batteries, and the display batteries require 2 AAA LR03 batteries. After inserting the batteries, simply place the sensor where you want to measure the temperature, and then you can read the display.