HIGH ACCURACY z0.1℃ Temperature accuracy with an adjustable temperature of 5-35℃; Dual sensor system, integrated temperature sensor for accurate air temperature measurement, external temperature sensor for overheating protection of the floor. DO NOT OPERATE HUB SMART BOILER THERMOSTAT.Control the heating simply by app, voice command or automatically by time windows and scenarios; Compatible with most boilers and water-guided underfloor heating; WLAN with 2.4GHz is required. We recognize the unique cooling needs that occur during the hot summer months; For this reason, we have introduced the summer mode; This function is designed for cooling systems such as air-energy heat pump systems; By activating the summer mode, you can optimize your cooling experience and maintain an ideal room temperature during the hot summer months. FOR APPLE HomeKit Meross Smart Home Thermostat supports voice control from Siri, Alexa and Google; Supports device control via Meross app and Apple Home (Apple Watch, Apple TV, HomePod); You can change the current temperature with voice commands; Android users use the Meross app on Android 6.0 or higher. BASIC INFORMATION The Smart Boiler Thermostat is 8.6 x 8.6 x 4.2 cm; Pure white LED backlight, covered by elegant glass pane; Package includes: 1.Smart Radiator Thermostat H11*Installation Guide*+1* Sensor+4.Screws; Meross offers a two-year warranty and lifetime technical support.