Features:Large LCD screen with blue backlight display and double temperature display mode with time display (minutes,hours,weeks).Adopt with the latest smart chip, which is in high-efficiency and more energy-saving.6 period programmable controlling temperature setting with internal and external temperature sensor for choice.Accuracy of 0.5?? keeps the comfortable temperature within the level you set.Allows you to control your water heating thermostat while away from the house with your mobile device.Setting temperature meets users demand of room temperature to control valve water heating device.Memory function when power failure to protect your setting from power failure.Room temperature automatical calibration function.