Radio Signal Thermometer can read signal up to 100 feet away. It has a main unit that can monitor up to 3 remote sensors. High quality Radio Signal Thermometer can read temperature up to 30 meters away. It consists of three different modules to transmit radio frequency of 433 MHz, with the range of 30 meters and data can be easily transmitted in 30 seconds. These modules transfer the data to the main unit and are available in the set of three channels 1, 2, and 3. Radio Signal Thermometer also has a Display’s trend indicator that depicts the rise and fall in temperature. Monitoring conditions also includes short and long periods inclusive of months and hours.