Features 1??[Stable]Relying on stable RF wireless technology, the thermostat is paired with the receiver, the signal is stable, and the pairing speed is fast. 2??[Smart Control]Supports application operation, easier for scheduling programs, set functions, and checks current states by the application. 3??[Multifunctional]With a 3.5inch large touch screen operation, more flexible and more experience. Support antifreeze function, child lock function, and humidity function. 4??[Weekly-programmable]Smart thermostat support up to 6 events that can be set separately for each day. 5??[Voice Control]You can use voice control through Home and Amazon Alexa for smart thermostats. Specifications Description: High-quality smart boiler thermostat including a transmitter (free-standing) and receiver (wall mounting) set with a transmission range of 100 m. Touch button operation is more flexible, and more experience. And you can also remotely control the thermostat by an app from your phone. Features: [Stable]Relying on stable RF wireless technology, the thermostat is paired with the receiver, the signal is stable, and the pairing speed is fast. [Smart Control]Supports application operation, easier for scheduling programs, set functions, and checks current states by the application. [Multifunctional]With a 3.5inch large touch screen operation, more flexible and more experience. Support antifreeze function, child lock function, and humidity function. [Weekly-programmable]Smart thermostat support up to 6 events that can be set separately for each day. [Voice Control]You can use voice control through Home and Amazon Alexa for smart thermostats. Specifications: Color: White; Black (Optional) Type: Boiler 3A Design: Wi-Fi Material: PC Battery: 3*AA Batteries(Not Included) Wireless Frequency: 433MHz(FSK) Transmission distance: