Compatible with Alexa: The smart thermostat water boiler thermostat can be controlled remotely by smart phone, you can control the water temperature via voice by connecting Alexa wherever and whenever, hands free and easy to control2 Modes: Our smart water heating thermostat supports manual and programmable modes, you can customize 5 + 2 days/6 periods according to your lifestyle, avoid energy wasting, more flexible to provide comfortable water temperatureSafe Reliable: This voice control thermostat features memory function and child lock function, help you control water temperature easily, large LCD screen helps you see the temperature easilyAccurate Effective: heating thermostat 0.5C temperature accuracy ensures the safety, water heating ranging will be 5-35C, no need to worry the measurement error, can be safely used for kids and childrenCompatibility: This temperature controller thermostat is mainly applicable to wall boilers, NC/NO valves, heat pumps and other water heaters, suitable for 60 mm square, 86*86 mm or European round models (not included)Digital ThermostatMultifunctionalThis thermostat also features a memory function and a child lock function, which provide better control and ensure the safety of children; it is designed with an elegant appearance, a large LCD screen and a touch screen for quick and easy operation.Temperature RangeDisplay Accuracy: 0.5 CSetting the Temperature Range: 5-35 CDisplay Temperature Range: 0-40 CWorking environment Temperature: 0-90 CColor: WhiteBacklight: Blue/WhiteDisplay: 64 x 64 mm LCD screenOutput: Switch RelayRunning Program: Set Per 1 Week as a CycleDataVoltage: 95-230VCurrent Charge: 3A (Water Heater Control)/16A (ElectricalTemperature Sensor: NTC (10K)1%Support system: for iOS 9.0 or higher, for Android 4.0 or superiorProtection class: IP 20Size: 8.6*8.6*2.7cm/3.4*3.4*1.1