Description :<br>WK-SM3A Smart Thermostat Adjustable Digital Temperature Controller <br>Features :<br>1. Can set the start temperature freely according to your needs， and automatically proceed the stop temperature and close a variety of electrical equipment supply2. Antifreeze function : When the boiler water down to 3 degrees Celsius， forced to start the circulation pump to prevent frozen pipes.3. Over-temperature alarm function : If the actual temperature is higher than the stop when the temperature 5 degrees ， the thermostat flashes digital ， SM3 also issued ringing ， the user is prompted timely manner.<br>Specification :<br>Model : WK-SM3AColor : WhiteWorks : Electronic ThermostatRated voltage : 220-250 V ACMaximum load power : 1200 WControllable temperature range : 3 ~94 degreeProbe line length : 2450 mmDimensions : 120 x 100x 20 mm<br>Package includes :<br>1 x WK-SM3A Smart Controller<br>Details pictures :