LED Susan is a real convenient faucet because the faucet has been equipped with a temperature sensor. The sensor will then tell the indicator how hot the water is and display the data visually to you. The visual data was using color indication, such as red means 38 degrees or above, or blue means it’s below 26 degrees. According to the source, the temperature detection will occurs within 3 seconds once you turn on the tap. Which mean you won’t wait for long time to know how hot your water is.