Utilizing a radio wave signal, this PINPOINT wireless thermometer measures the temperature at remote sensors, displaying the reading in either oF or oC. The monitor can accept up to four different remote sensors and receive signals as far as 100 feet (30 meters) in optimum conditions. The remote sensors have a waterproof probe tip attached to a 36” cable. The monitor and remote sensors require two AAA batteries each (not included). Monitor includes one remote sensor. The LCD display is 1.75” x 1.75”.