The Sonoff Zigbee Bridge Pro AirGuard TH TRVZB kit provides a coordinated system for managing your home's indoor climate. At its center is the Zigbee Bridge Pro, a compact 62 x 62 x 20 mm hub made of flame-retardant PC V0 material that connects up to 128 secondary devices via Zigbee 3.0 and Wi-Fi. This hub allows you to switch between Home, Away, and Sleep modes to better manage your environment based on your daily routine, and it integrates easily with Amazon Alexa, Google Assistant, and SmartThings for voice or app control. To monitor your surroundings, the kit includes the AirGuard TH climate sensor, which features a 3.6-inch LCD screen for quick viewing of temperature, humidity, dew point, and vapor pressure deficit. This sensor tracks the maximum and minimum values from the last 24 hours, helping you understand how your room's air quality fluctuates. For active heating control, the TRVZB smart thermostatic radiator valve fits standard M30 x 1.5 mm threaded connections and allows you to adjust your radiator temperature between 4 and 35 °C. Both the sensor and the valve run on batteries, meaning you can place them where they are most needed without worrying about power cables.